Argon

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Gas phase thermochemistry data

Go To: Top, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
gas,1 bar154.846 ± 0.003J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar154.84J/mol*KReviewChase, 1998Data last reviewed in March, 1982

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 6000.
A 20.78600
B 2.825911×10-7
C -1.464191×10-7
D 1.092131×10-8
E -3.661371×10-8
F -6.197350
G 179.9990
H 0.000000
ReferenceChase, 1998
Comment Data last reviewed in March, 1982

Phase change data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

Quantity Value Units Method Reference Comment
Tboil87.5KN/AStreng, 1971Uncertainty assigned by TRC = 0.3 K; TRC
Tboil87.28KN/AGosman, McCarty, et al., 1969Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Tfus83.8KN/AVan't Zelfde, Omar, et al., 1968Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Ttriple87.78KN/AAngus, Armstrong, et al., 1972Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple83.8KN/AGosman, McCarty, et al., 1969Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple83.8KN/AZiegler, Mullins, et al., 1962Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple83.78KN/AClark, Din, et al., 1951Uncertainty assigned by TRC = 0.04 K; TRC
Ttriple83.78KN/AClusius and Weigand, 1940Uncertainty assigned by TRC = 0.2 K; See property X for dP/dT at triple point; TRC
Quantity Value Units Method Reference Comment
Ptriple0.689barN/AGosman, McCarty, et al., 1969Uncertainty assigned by TRC = 0.0001 bar; TRC
Ptriple0.689barN/AZiegler, Mullins, et al., 1962Uncertainty assigned by TRC = 0.0001 bar; TRC
Ptriple0.6875barN/AClark, Din, et al., 1951Uncertainty assigned by TRC = 0.0007 bar; TRC
Quantity Value Units Method Reference Comment
Tc150.86KN/AAngus, Armstrong, et al., 1972Uncertainty assigned by TRC = 0.1 K; TRC
Tc150.86KN/AGosman, McCarty, et al., 1969Uncertainty assigned by TRC = 0.1 K; TRC
Tc150.65KN/AMcCain and Ziegler, 1967Uncertainty assigned by TRC = 0.03 K; TRC
Quantity Value Units Method Reference Comment
Pc4.8979barN/AAngus, Armstrong, et al., 1972Uncertainty assigned by TRC = 0.002 bar; TRC
Pc48.9805barN/AGosman, McCarty, et al., 1969Uncertainty assigned by TRC = 0.1013 bar; TRC
Pc48.5549barN/AMcCain and Ziegler, 1967Uncertainty assigned by TRC = 0.0709 bar; TRC
Quantity Value Units Method Reference Comment
ρc13.41mol/lN/AAngus, Armstrong, et al., 1972Uncertainty assigned by TRC = 0.005 mol/l; TRC
ρc8.4029mol/lN/AGosman, McCarty, et al., 1969Uncertainty assigned by TRC = 0.008 mol/l; TRC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
114.40 - 150.314.46903481.01222.156McCain and Ziegler, 1967Coefficents calculated by NIST from author's data.
83.78 - 150.723.29555215.24-22.233Drii and Rabinovich, 1966Coefficents calculated by NIST from author's data.
129.33 - 147.404.97171658.98249.819van Itterbeek, Verbeke, et al., 1963Coefficents calculated by NIST from author's data.
90.94 - 101.483.73479302.683-6.083Clark, Din, et al., 1951, 2Coefficents calculated by NIST from author's data.

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
RCD - Robert C. Dunbar
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 1 to 50

Lithium ion (1+) + Argon = (Lithium ion (1+) • Argon)

By formula: Li+ + Ar = (Li+ • Ar)

Quantity Value Units Method Reference Comment
Δr30. ± 4.kJ/molAVGN/AAverage of 4 out of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Δr30.J/mol*KDTMcKnight and Sawina, 1973gas phase; ΔrS approximate; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
5.9294.IMobCassidy and Elford, 1985gas phase; M
7.9319.DTKeller, Beyer, et al., 1973gas phase; LOW E/N; M
11.215.DTMcKnight and Sawina, 1973gas phase; ΔrS approximate; M

Ar+ + Argon = (Ar+ • Argon)

By formula: Ar+ + Ar = (Ar+ • Ar)

Quantity Value Units Method Reference Comment
Δr100. ± 90.kJ/molAVGN/AAverage of 5 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Δr53.6J/mol*KPHPMSTeng and Conway, 1973gas phase; switching reaction(N2+)Ar; Turner and Conway, 1979, Liu and Conway, 1975; M

Potassium ion (1+) + Argon = (Potassium ion (1+) • Argon)

By formula: K+ + Ar = (K+ • Ar)

Quantity Value Units Method Reference Comment
Δr12. ± 3.kJ/molAVGN/AAverage of 9 values; Individual data points

Nitrogen cation + Argon = (Nitrogen cation • Argon)

By formula: N2+ + Ar = (N2+ • Ar)

Quantity Value Units Method Reference Comment
Δr112.kJ/molPD/KERDKim and Bowers, 1990gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M
Δr106.kJ/molPHPMSTeng and Conway, 1973gas phase; switching reaction(N2+)N2; M
Quantity Value Units Method Reference Comment
Δr81.6J/mol*KPD/KERDKim and Bowers, 1990gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M
Δr57.3J/mol*KPHPMSTeng and Conway, 1973gas phase; switching reaction(N2+)N2; M

Cesium ion (1+) + Argon = (Cesium ion (1+) • Argon)

By formula: Cs+ + Ar = (Cs+ • Ar)

Quantity Value Units Method Reference Comment
Δr8.16kJ/molIMobGatland, 1984gas phase; M
Δr6.11kJ/molSCATTERINGGislason, 1984gas phase; M
Δr8.20kJ/molIMobViehland, 1984gas phase; M
Δr9.54kJ/molIMobTakebe, 1983gas phase; M
Δr9.6kJ/molIMobTakebe, 1983gas phase; values from this reference are consistently too high; M

Chromium ion (1+) + Argon = (Chromium ion (1+) • Argon)

By formula: Cr+ + Ar = (Cr+ • Ar)

Quantity Value Units Method Reference Comment
Δr29. ± 2.kJ/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 27.4 kJ/mol, ΔrS(100 K) = 60.2 J/mol*K; M
Quantity Value Units Method Reference Comment
Δr66.1J/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 27.4 kJ/mol, ΔrS(100 K) = 60.2 J/mol*K; M

Sodium ion (1+) + Argon = (Sodium ion (1+) • Argon)

By formula: Na+ + Ar = (Na+ • Ar)

Quantity Value Units Method Reference Comment
Δr15. ± 8.8kJ/molCIDTArmentrout and Rodgers, 2000RCD
Δr15.5kJ/molSCATTERINGGislason, 1984gas phase; M
Δr18.4kJ/molIMobViehland, 1984gas phase; M
Δr18.kJ/molDTMcKnight and Sawina, 1973gas phase; M
Δr20.4kJ/molIMobTakebe, 1983gas phase; M

H3+ + Argon = (H3+ • Argon)

By formula: H3+ + Ar = (H3+ • Ar)

Quantity Value Units Method Reference Comment
Δr28.0 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Δr31. ± 3.kJ/molSIFTBedford and Smith, 1990gas phase; switching reaction(H3+)H2, Hiraoka and Mori, 1989; M
Quantity Value Units Method Reference Comment
Δr56.1J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

Xe+ + Argon = (Xe+ • Argon)

By formula: Xe+ + Ar = (Xe+ • Ar)

Quantity Value Units Method Reference Comment
Δr17.kJ/molPIDehmer and Pratt, 1982gas phase; M
Δr25.kJ/molSIFTJones, Lister, et al., 1980gas phase; M
Δr13.kJ/molPINg, Tiedemann, et al., 1977gas phase; M
Quantity Value Units Method Reference Comment
Δr81.2J/mol*KSIFTJones, Lister, et al., 1980gas phase; M

(Ar+ • 2Argon) + Argon = (Ar+ • 3Argon)

By formula: (Ar+ • 2Ar) + Ar = (Ar+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr20. ± 1.kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.4J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
8.477.PHPMSTeng and Conway, 1973gas phase; M

(Nitrogen cation • 7Argon) + Argon = (Nitrogen cation • 8Argon)

By formula: (N2+ • 7Ar) + Ar = (N2+ • 8Ar)

Quantity Value Units Method Reference Comment
Δr6.40kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr71.J/mol*KN/AHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M

(Nitrogen cation • 8Argon) + Argon = (Nitrogen cation • 9Argon)

By formula: (N2+ • 8Ar) + Ar = (N2+ • 9Ar)

Quantity Value Units Method Reference Comment
Δr6.36kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr71.J/mol*KN/AHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M

Fluorine anion + Argon = ArF-

By formula: F- + Ar = ArF-

Quantity Value Units Method Reference Comment
Δr8.37kJ/molTDAsWada, Kikkawa, et al., 2007gas phase; Entropy estimated; B
Quantity Value Units Method Reference Comment
Δr-16.6kJ/molTDAsWada, Kikkawa, et al., 2007gas phase; Entropy estimated; B

Rubidium ion (1+) + Argon = (Rubidium ion (1+) • Argon)

By formula: Rb+ + Ar = (Rb+ • Ar)

Quantity Value Units Method Reference Comment
Δr8.49kJ/molIMobGatland, 1984gas phase; M
Δr8.28kJ/molIMobViehland, 1984gas phase; M
Δr11.9kJ/molIMobTakebe, 1983gas phase; M

(O- • 10Argon) + Argon = (O- • 11Argon)

By formula: (O- • 10Ar) + Ar = (O- • 11Ar)

Quantity Value Units Method Reference Comment
Δr2. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 11Argon) + Argon = (O- • 12Argon)

By formula: (O- • 11Ar) + Ar = (O- • 12Ar)

Quantity Value Units Method Reference Comment
Δr3. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 12Argon) + Argon = (O- • 13Argon)

By formula: (O- • 12Ar) + Ar = (O- • 13Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 13Argon) + Argon = (O- • 14Argon)

By formula: (O- • 13Ar) + Ar = (O- • 14Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 14Argon) + Argon = (O- • 15Argon)

By formula: (O- • 14Ar) + Ar = (O- • 15Ar)

Quantity Value Units Method Reference Comment
Δr2. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 15Argon) + Argon = (O- • 16Argon)

By formula: (O- • 15Ar) + Ar = (O- • 16Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 16Argon) + Argon = (O- • 17Argon)

By formula: (O- • 16Ar) + Ar = (O- • 17Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 17Argon) + Argon = (O- • 18Argon)

By formula: (O- • 17Ar) + Ar = (O- • 18Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 18Argon) + Argon = (O- • 19Argon)

By formula: (O- • 18Ar) + Ar = (O- • 19Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 19Argon) + Argon = (O- • 20Argon)

By formula: (O- • 19Ar) + Ar = (O- • 20Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 20Argon) + Argon = (O- • 21Argon)

By formula: (O- • 20Ar) + Ar = (O- • 21Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 21Argon) + Argon = (O- • 22Argon)

By formula: (O- • 21Ar) + Ar = (O- • 22Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 22Argon) + Argon = (O- • 23Argon)

By formula: (O- • 22Ar) + Ar = (O- • 23Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 23Argon) + Argon = (O- • 24Argon)

By formula: (O- • 23Ar) + Ar = (O- • 24Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 24Argon) + Argon = (O- • 25Argon)

By formula: (O- • 24Ar) + Ar = (O- • 25Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 25Argon) + Argon = (O- • 26Argon)

By formula: (O- • 25Ar) + Ar = (O- • 26Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 9Argon) + Argon = (O- • 10Argon)

By formula: (O- • 9Ar) + Ar = (O- • 10Ar)

Quantity Value Units Method Reference Comment
Δr3. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 2Argon) + Argon = (O- • 3Argon)

By formula: (O- • 2Ar) + Ar = (O- • 3Ar)

Quantity Value Units Method Reference Comment
Δr6.7 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 3Argon) + Argon = (O- • 4Argon)

By formula: (O- • 3Ar) + Ar = (O- • 4Ar)

Quantity Value Units Method Reference Comment
Δr5.9 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 4Argon) + Argon = (O- • 5Argon)

By formula: (O- • 4Ar) + Ar = (O- • 5Ar)

Quantity Value Units Method Reference Comment
Δr5.0 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 5Argon) + Argon = (O- • 6Argon)

By formula: (O- • 5Ar) + Ar = (O- • 6Ar)

Quantity Value Units Method Reference Comment
Δr5.0 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 6Argon) + Argon = (O- • 7Argon)

By formula: (O- • 6Ar) + Ar = (O- • 7Ar)

Quantity Value Units Method Reference Comment
Δr4.2 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 7Argon) + Argon = (O- • 8Argon)

By formula: (O- • 7Ar) + Ar = (O- • 8Ar)

Quantity Value Units Method Reference Comment
Δr4. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 8Argon) + Argon = (O- • 9Argon)

By formula: (O- • 8Ar) + Ar = (O- • 9Ar)

Quantity Value Units Method Reference Comment
Δr4. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • Argon) + Argon = (O- • 2Argon)

By formula: (O- • Ar) + Ar = (O- • 2Ar)

Quantity Value Units Method Reference Comment
Δr8.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(Ar+ • Argon) + Argon = (Ar+ • 2Argon)

By formula: (Ar+ • Ar) + Ar = (Ar+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr21.2 ± 0.3kJ/molPHPMSTurner and Conway, 1979gas phase; M
Quantity Value Units Method Reference Comment
Δr84.9J/mol*KPHPMSTurner and Conway, 1979gas phase; M

(Nitrogen cation • Argon) + Argon = (Nitrogen cation • 2Argon)

By formula: (N2+ • Ar) + Ar = (N2+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr16.kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; ΔrH>; M
Quantity Value Units Method Reference Comment
Δr71.J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; ΔrH>; M

O- + Argon = (O- • Argon)

By formula: O- + Ar = (O- • Ar)

Quantity Value Units Method Reference Comment
Δr9.2 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(Ar+ • 10Argon) + Argon = (Ar+ • 11Argon)

By formula: (Ar+ • 10Ar) + Ar = (Ar+ • 11Ar)

Quantity Value Units Method Reference Comment
Δr6.5 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 9Argon) + Argon = (Ar+ • 10Argon)

By formula: (Ar+ • 9Ar) + Ar = (Ar+ • 10Ar)

Quantity Value Units Method Reference Comment
Δr6.49 ± 0.84kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr71.5J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(D3+ • 2Argon) + Argon = (D3+ • 3Argon)

By formula: (D3+ • 2Ar) + Ar = (D3+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr18.6 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr77.0J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 3Argon) + Argon = (D3+ • 4Argon)

By formula: (D3+ • 3Ar) + Ar = (D3+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr10.2 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr69.5J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 4Argon) + Argon = (D3+ • 5Argon)

By formula: (D3+ • 4Ar) + Ar = (D3+ • 5Ar)

Quantity Value Units Method Reference Comment
Δr9.5 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 5Argon) + Argon = (D3+ • 6Argon)

By formula: (D3+ • 5Ar) + Ar = (D3+ • 6Ar)

Quantity Value Units Method Reference Comment
Δr9.1 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr79.9J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 6Argon) + Argon = (D3+ • 7Argon)

By formula: (D3+ • 6Ar) + Ar = (D3+ • 7Ar)

Quantity Value Units Method Reference Comment
Δr6.5 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr105.J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(Ar+ • 3Argon) + Argon = (Ar+ • 4Argon)

By formula: (Ar+ • 3Ar) + Ar = (Ar+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr7.0 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr58.2J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference
0.00141500.LN/A
0.00141100.MN/A

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, Mass spectrum (electron ionization), Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Quantity Value Units Method Reference Comment
IE (evaluated)15.759 ± 0.001eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)369.2kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity346.3kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
15.763PIPECOWeitzel, Mahnert, et al., 1994LL
15.75962EVALLide, 1992LL
15.82EIWetzel, Baiocchi, et al., 1987LBLHLM
15.760SKelly, 1987LBLHLM
15.759PEKimura, Katsumata, et al., 1981LLK
15.88EIClare and Sowerby, 1981LLK
15.7EIFreiser, 1980LLK
15.75962 ± 0.00001SMinnhagen, 1973LLK
15.753 ± 0.002TESpohr, Guyon, et al., 1971LLK
15.75962 ± 0.00001SYoshino, 1970RDSH
15.759SYoshino, 1969RDSH
15.713 ± 0.003CIHotop and Niehaus, 1969RDSH
15.757 ± 0.005PECollin and Natalis, 1968RDSH
15.74 ± 0.05EIGallegos and Klaver, 1967RDSH
15.78 ± 0.03EIWinters, Collins, et al., 1966RDSH
15.79PEAl-Joboury and Turner, 1963RDSH

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Mass spectrum (electron ionization), Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess
RCD - Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Ar+ + Argon = (Ar+ • Argon)

By formula: Ar+ + Ar = (Ar+ • Ar)

Quantity Value Units Method Reference Comment
Δr100. ± 90.kJ/molAVGN/AAverage of 5 out of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Δr53.6J/mol*KPHPMSTeng and Conway, 1973gas phase; switching reaction(N2+)Ar; Turner and Conway, 1979, Liu and Conway, 1975; M

(Ar+ • Argon) + Argon = (Ar+ • 2Argon)

By formula: (Ar+ • Ar) + Ar = (Ar+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr21.2 ± 0.3kJ/molPHPMSTurner and Conway, 1979gas phase; M
Quantity Value Units Method Reference Comment
Δr84.9J/mol*KPHPMSTurner and Conway, 1979gas phase; M

(Ar+ • 2Argon) + Argon = (Ar+ • 3Argon)

By formula: (Ar+ • 2Ar) + Ar = (Ar+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr20. ± 1.kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.4J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
8.477.PHPMSTeng and Conway, 1973gas phase; M

(Ar+ • 3Argon) + Argon = (Ar+ • 4Argon)

By formula: (Ar+ • 3Ar) + Ar = (Ar+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr7.0 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr58.2J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 4Argon) + Argon = (Ar+ • 5Argon)

By formula: (Ar+ • 4Ar) + Ar = (Ar+ • 5Ar)

Quantity Value Units Method Reference Comment
Δr6.8 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr67.4J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 5Argon) + Argon = (Ar+ • 6Argon)

By formula: (Ar+ • 5Ar) + Ar = (Ar+ • 6Ar)

Quantity Value Units Method Reference Comment
Δr6.8 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr71.1J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 6Argon) + Argon = (Ar+ • 7Argon)

By formula: (Ar+ • 6Ar) + Ar = (Ar+ • 7Ar)

Quantity Value Units Method Reference Comment
Δr6.7 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 7Argon) + Argon = (Ar+ • 8Argon)

By formula: (Ar+ • 7Ar) + Ar = (Ar+ • 8Ar)

Quantity Value Units Method Reference Comment
Δr6.7 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 8Argon) + Argon = (Ar+ • 9Argon)

By formula: (Ar+ • 8Ar) + Ar = (Ar+ • 9Ar)

Quantity Value Units Method Reference Comment
Δr6.6 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.4J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 9Argon) + Argon = (Ar+ • 10Argon)

By formula: (Ar+ • 9Ar) + Ar = (Ar+ • 10Ar)

Quantity Value Units Method Reference Comment
Δr6.49 ± 0.84kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr71.5J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

(Ar+ • 10Argon) + Argon = (Ar+ • 11Argon)

By formula: (Ar+ • 10Ar) + Ar = (Ar+ • 11Ar)

Quantity Value Units Method Reference Comment
Δr6.5 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989, 2gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka and Mori, 1989, 2gas phase; M

ArNO- + 2Argon = Ar2NO-

By formula: ArNO- + 2Ar = Ar2NO-

Quantity Value Units Method Reference Comment
Δr6.28kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar2NO- + 3Argon = Ar3NO-

By formula: Ar2NO- + 3Ar = Ar3NO-

Quantity Value Units Method Reference Comment
Δr5.44kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar3NO- + 4Argon = Ar4NO-

By formula: Ar3NO- + 4Ar = Ar4NO-

Quantity Value Units Method Reference Comment
Δr5.44kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar4NO- + 5Argon = Ar5NO-

By formula: Ar4NO- + 5Ar = Ar5NO-

Quantity Value Units Method Reference Comment
Δr5.44kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar5NO- + 6Argon = Ar6NO-

By formula: Ar5NO- + 6Ar = Ar6NO-

Quantity Value Units Method Reference Comment
Δr5.02kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar6NO- + 7Argon = Ar7NO-

By formula: Ar6NO- + 7Ar = Ar7NO-

Quantity Value Units Method Reference Comment
Δr3.8kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar7NO- + 8Argon = Ar8NO-

By formula: Ar7NO- + 8Ar = Ar8NO-

Quantity Value Units Method Reference Comment
Δr3.8kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar8NO- + 9Argon = Ar9NO-

By formula: Ar8NO- + 9Ar = Ar9NO-

Quantity Value Units Method Reference Comment
Δr2.9kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar9NO- + 10Argon = Ar10NO-

By formula: Ar9NO- + 10Ar = Ar10NO-

Quantity Value Units Method Reference Comment
Δr2.9kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar10NO- + 11Argon = Ar11NO-

By formula: Ar10NO- + 11Ar = Ar11NO-

Quantity Value Units Method Reference Comment
Δr2.5kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar11NO- + 12Argon = Ar12NO-

By formula: Ar11NO- + 12Ar = Ar12NO-

Quantity Value Units Method Reference Comment
Δr2.9kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar12NO- + 13Argon = Ar13NO-

By formula: Ar12NO- + 13Ar = Ar13NO-

Quantity Value Units Method Reference Comment
Δr1.3kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Ar13NO- + 14Argon = Ar14NO-

By formula: Ar13NO- + 14Ar = Ar14NO-

Quantity Value Units Method Reference Comment
Δr0.84kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B

Bromine anion + Argon = (Bromine anion • Argon)

By formula: Br- + Ar = (Br- • Ar)

Quantity Value Units Method Reference Comment
Δr3.3kJ/molTherZhao, Yourshaw, et al., 1994gas phase; B
Δr5.86kJ/molMoblGatland, 1984, 2gas phase; B,M

Methyl cation + Argon = (Methyl cation • Argon)

By formula: CH3+ + Ar = (CH3+ • Ar)

Quantity Value Units Method Reference Comment
Δr47.3 ± 8.4kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr84.1J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • Argon) + Argon = (Methyl cation • 2Argon)

By formula: (CH3+ • Ar) + Ar = (CH3+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr9.5 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr65.7J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • 2Argon) + Argon = (Methyl cation • 3Argon)

By formula: (CH3+ • 2Ar) + Ar = (CH3+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr8.2 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr93.3J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • 3Argon) + Argon = (Methyl cation • 4Argon)

By formula: (CH3+ • 3Ar) + Ar = (CH3+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr8.2 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr88.3J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • 4Argon) + Argon = (Methyl cation • 5Argon)

By formula: (CH3+ • 4Ar) + Ar = (CH3+ • 5Ar)

Quantity Value Units Method Reference Comment
Δr8.1 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr86.2J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • 5Argon) + Argon = (Methyl cation • 6Argon)

By formula: (CH3+ • 5Ar) + Ar = (CH3+ • 6Ar)

Quantity Value Units Method Reference Comment
Δr8. ± 1.kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr87.9J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • 6Argon) + Argon = (Methyl cation • 7Argon)

By formula: (CH3+ • 6Ar) + Ar = (CH3+ • 7Ar)

Quantity Value Units Method Reference Comment
Δr8. ± 2.kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr88.7J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation • 7Argon) + Argon = (Methyl cation • 8Argon)

By formula: (CH3+ • 7Ar) + Ar = (CH3+ • 8Ar)

Quantity Value Units Method Reference Comment
Δr8.08kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; Entropy change calculated or estimated; M

CO+ + Argon = (CO+ • Argon)

By formula: CO+ + Ar = (CO+ • Ar)

Quantity Value Units Method Reference Comment
Δr67.4 ± 5.9kJ/molPIPECONorwood, Guo, et al., 1989gas phase; CO+(X) ground state; M

CO2+ + Argon = (CO2+ • Argon)

By formula: CO2+ + Ar = (CO2+ • Ar)

Quantity Value Units Method Reference Comment
Δr25.kJ/molPIPratt and Dehmer, 1983gas phase; M

Cobalt ion (1+) + Argon = (Cobalt ion (1+) • Argon)

By formula: Co+ + Ar = (Co+ • Ar)

Quantity Value Units Method Reference Comment
Δr49.4kJ/molPDisAsher, Bellert, et al., 1994RCD

Chromium ion (1+) + Argon = (Chromium ion (1+) • Argon)

By formula: Cr+ + Ar = (Cr+ • Ar)

Quantity Value Units Method Reference Comment
Δr29. ± 2.kJ/molSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 27.4 kJ/mol, ΔrS(100 K) = 60.2 J/mol*K; M
Quantity Value Units Method Reference Comment
Δr66.1J/mol*KSIDTKemper, Hsu, et al., 1991gas phase; ΔrH(0 K) = 27.4 kJ/mol, ΔrS(100 K) = 60.2 J/mol*K; M

Cesium ion (1+) + Argon = (Cesium ion (1+) • Argon)

By formula: Cs+ + Ar = (Cs+ • Ar)

Quantity Value Units Method Reference Comment
Δr8.16kJ/molIMobGatland, 1984gas phase; M
Δr6.11kJ/molSCATTERINGGislason, 1984gas phase; M
Δr8.20kJ/molIMobViehland, 1984gas phase; M
Δr9.54kJ/molIMobTakebe, 1983gas phase; M
Δr9.6kJ/molIMobTakebe, 1983gas phase; values from this reference are consistently too high; M

D3+ + Argon = (D3+ • Argon)

By formula: D3+ + Ar = (D3+ • Ar)

Quantity Value Units Method Reference Comment
Δr29.1 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr60.7J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • Argon) + Argon = (D3+ • 2Argon)

By formula: (D3+ • Ar) + Ar = (D3+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr20.1 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr73.2J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 2Argon) + Argon = (D3+ • 3Argon)

By formula: (D3+ • 2Ar) + Ar = (D3+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr18.6 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr77.0J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 3Argon) + Argon = (D3+ • 4Argon)

By formula: (D3+ • 3Ar) + Ar = (D3+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr10.2 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr69.5J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 4Argon) + Argon = (D3+ • 5Argon)

By formula: (D3+ • 4Ar) + Ar = (D3+ • 5Ar)

Quantity Value Units Method Reference Comment
Δr9.5 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 5Argon) + Argon = (D3+ • 6Argon)

By formula: (D3+ • 5Ar) + Ar = (D3+ • 6Ar)

Quantity Value Units Method Reference Comment
Δr9.1 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr79.9J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(D3+ • 6Argon) + Argon = (D3+ • 7Argon)

By formula: (D3+ • 6Ar) + Ar = (D3+ • 7Ar)

Quantity Value Units Method Reference Comment
Δr6.5 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr105.J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

Fluorine anion + Argon = ArF-

By formula: F- + Ar = ArF-

Quantity Value Units Method Reference Comment
Δr8.37kJ/molTDAsWada, Kikkawa, et al., 2007gas phase; Entropy estimated; B
Quantity Value Units Method Reference Comment
Δr-16.6kJ/molTDAsWada, Kikkawa, et al., 2007gas phase; Entropy estimated; B

Iron ion (1+) + Argon = (Iron ion (1+) • Argon)

By formula: Fe+ + Ar = (Fe+ • Ar)

Quantity Value Units Method Reference Comment
Δr11. ± 7.9kJ/molCIDTRodgers and Armentrout, 2000RCD

Hydrogen cation + Argon = (Hydrogen cation • Argon)

By formula: H2+ + Ar = (H2+ • Ar)

Quantity Value Units Method Reference Comment
Δr100.kJ/molSIFTBedford and Smith, 1990gas phase; switching reaction(Ar+)Ar, ΔrH>; M

H3+ + Argon = (H3+ • Argon)

By formula: H3+ + Ar = (H3+ • Ar)

Quantity Value Units Method Reference Comment
Δr28.0 ± 0.8kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Δr31. ± 3.kJ/molSIFTBedford and Smith, 1990gas phase; switching reaction(H3+)H2, Hiraoka and Mori, 1989; M
Quantity Value Units Method Reference Comment
Δr56.1J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(H3+ • Argon) + Argon = (H3+ • 2Argon)

By formula: (H3+ • Ar) + Ar = (H3+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr19.1 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr66.9J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(H3+ • 2Argon) + Argon = (H3+ • 3Argon)

By formula: (H3+ • 2Ar) + Ar = (H3+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr17.9 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr72.4J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(H3+ • 3Argon) + Argon = (H3+ • 4Argon)

By formula: (H3+ • 3Ar) + Ar = (H3+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr10.3 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr67.4J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(H3+ • 4Argon) + Argon = (H3+ • 5Argon)

By formula: (H3+ • 4Ar) + Ar = (H3+ • 5Ar)

Quantity Value Units Method Reference Comment
Δr9.5 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr69.9J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(H3+ • 5Argon) + Argon = (H3+ • 6Argon)

By formula: (H3+ • 5Ar) + Ar = (H3+ • 6Ar)

Quantity Value Units Method Reference Comment
Δr9.1 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr78.2J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

(H3+ • 6Argon) + Argon = (H3+ • 7Argon)

By formula: (H3+ • 6Ar) + Ar = (H3+ • 7Ar)

Quantity Value Units Method Reference Comment
Δr6.5 ± 0.4kJ/molPHPMSHiraoka and Mori, 1989gas phase; M
Quantity Value Units Method Reference Comment
Δr96.2J/mol*KPHPMSHiraoka and Mori, 1989gas phase; M

Hg+ + Argon = (Hg+ • Argon)

By formula: Hg+ + Ar = (Hg+ • Ar)

Quantity Value Units Method Reference Comment
Δr22. ± 2.kJ/molPILinn, Brom, et al., 1985gas phase; M

Iodide + Argon = (Iodide • Argon)

By formula: I- + Ar = (I- • Ar)

Quantity Value Units Method Reference Comment
Δr2.5kJ/molTherZhao, Yourshaw, et al., 1994gas phase; B

Potassium ion (1+) + Argon = (Potassium ion (1+) • Argon)

By formula: K+ + Ar = (K+ • Ar)

Quantity Value Units Method Reference Comment
Δr12. ± 3.kJ/molAVGN/AAverage of 9 values; Individual data points

Kr+ + Argon = (Kr+ • Argon)

By formula: Kr+ + Ar = (Kr+ • Ar)

Quantity Value Units Method Reference Comment
Δr51.0kJ/molPIDehmer and Pratt, 1982gas phase; M
Δr56.9kJ/molPINg, Tiedemann, et al., 1977gas phase; M

Lithium ion (1+) + Argon = (Lithium ion (1+) • Argon)

By formula: Li+ + Ar = (Li+ • Ar)

Quantity Value Units Method Reference Comment
Δr30. ± 4.kJ/molAVGN/AAverage of 4 out of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Δr30.J/mol*KDTMcKnight and Sawina, 1973gas phase; ΔrS approximate; M

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
5.9294.IMobCassidy and Elford, 1985gas phase; M
7.9319.DTKeller, Beyer, et al., 1973gas phase; LOW E/N; M
11.215.DTMcKnight and Sawina, 1973gas phase; ΔrS approximate; M

Magnesium ion (1+) + Argon = (Magnesium ion (1+) • Argon)

By formula: Mg+ + Ar = (Mg+ • Ar)

Quantity Value Units Method Reference Comment
Δr9.6 ± 6.7kJ/molCIDTAndersen, Muntean, et al., 2000RCD

N+ + Argon = (N+ • Argon)

By formula: N+ + Ar = (N+ • Ar)

Enthalpy of reaction

ΔrH° (kJ/mol) T (K) Method Reference Comment
118. (+44.,-0.) CIDHaynes, Freysinger, et al., 1995gas phase; giuded ion beam CID; M

Nitric oxide anion + Argon = (Nitric oxide anion • Argon)

By formula: NO- + Ar = (NO- • Ar)

Quantity Value Units Method Reference Comment
Δr5.4 ± 3.8kJ/molN/AHendricks, de Clercq, et al., 2002gas phase; B
Δr6.7 ± 1.3kJ/molN/ABowen and Eaton, 1988gas phase; B

Nitrogen cation + Argon = (Nitrogen cation • Argon)

By formula: N2+ + Ar = (N2+ • Ar)

Quantity Value Units Method Reference Comment
Δr112.kJ/molPD/KERDKim and Bowers, 1990gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M
Δr106.kJ/molPHPMSTeng and Conway, 1973gas phase; switching reaction(N2+)N2; M
Quantity Value Units Method Reference Comment
Δr81.6J/mol*KPD/KERDKim and Bowers, 1990gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988; M
Δr57.3J/mol*KPHPMSTeng and Conway, 1973gas phase; switching reaction(N2+)N2; M

(Nitrogen cation • Argon) + Argon = (Nitrogen cation • 2Argon)

By formula: (N2+ • Ar) + Ar = (N2+ • 2Ar)

Quantity Value Units Method Reference Comment
Δr16.kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; ΔrH>; M
Quantity Value Units Method Reference Comment
Δr71.J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; ΔrH>; M

(Nitrogen cation • 2Argon) + Argon = (Nitrogen cation • 3Argon)

By formula: (N2+ • 2Ar) + Ar = (N2+ • 3Ar)

Quantity Value Units Method Reference Comment
Δr7.3 ± 0.8kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; M
Quantity Value Units Method Reference Comment
Δr57.3J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; M

(Nitrogen cation • 3Argon) + Argon = (Nitrogen cation • 4Argon)

By formula: (N2+ • 3Ar) + Ar = (N2+ • 4Ar)

Quantity Value Units Method Reference Comment
Δr7.0 ± 0.8kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; M
Quantity Value Units Method Reference Comment
Δr74.9J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; M

(Nitrogen cation • 4Argon) + Argon = (Nitrogen cation • 5Argon)

By formula: (N2+ • 4Ar) + Ar = (N2+ • 5Ar)

Quantity Value Units Method Reference Comment
Δr6.6 ± 0.8kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; M
Quantity Value Units Method Reference Comment
Δr71.1J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; M

(Nitrogen cation • 5Argon) + Argon = (Nitrogen cation • 6Argon)

By formula: (N2+ • 5Ar) + Ar = (N2+ • 6Ar)

Quantity Value Units Method Reference Comment
Δr6.5 ± 0.8kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; M
Quantity Value Units Method Reference Comment
Δr72.8J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; M

(Nitrogen cation • 6Argon) + Argon = (Nitrogen cation • 7Argon)

By formula: (N2+ • 6Ar) + Ar = (N2+ • 7Ar)

Quantity Value Units Method Reference Comment
Δr6.4 ± 0.8kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; M
Quantity Value Units Method Reference Comment
Δr72.4J/mol*KPHPMSHiraoka, Mori, et al., 1992gas phase; M

(Nitrogen cation • 7Argon) + Argon = (Nitrogen cation • 8Argon)

By formula: (N2+ • 7Ar) + Ar = (N2+ • 8Ar)

Quantity Value Units Method Reference Comment
Δr6.40kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr71.J/mol*KN/AHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M

(Nitrogen cation • 8Argon) + Argon = (Nitrogen cation • 9Argon)

By formula: (N2+ • 8Ar) + Ar = (N2+ • 9Ar)

Quantity Value Units Method Reference Comment
Δr6.36kJ/molPHPMSHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr71.J/mol*KN/AHiraoka, Mori, et al., 1992gas phase; Entropy change calculated or estimated; M

Sodium ion (1+) + Argon = (Sodium ion (1+) • Argon)

By formula: Na+ + Ar = (Na+ • Ar)

Quantity Value Units Method Reference Comment
Δr15. ± 8.8kJ/molCIDTArmentrout and Rodgers, 2000RCD
Δr15.5kJ/molSCATTERINGGislason, 1984gas phase; M
Δr18.4kJ/molIMobViehland, 1984gas phase; M
Δr18.kJ/molDTMcKnight and Sawina, 1973gas phase; M
Δr20.4kJ/molIMobTakebe, 1983gas phase; M

O- + Argon = (O- • Argon)

By formula: O- + Ar = (O- • Ar)

Quantity Value Units Method Reference Comment
Δr9.2 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • Argon) + Argon = (O- • 2Argon)

By formula: (O- • Ar) + Ar = (O- • 2Ar)

Quantity Value Units Method Reference Comment
Δr8.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 2Argon) + Argon = (O- • 3Argon)

By formula: (O- • 2Ar) + Ar = (O- • 3Ar)

Quantity Value Units Method Reference Comment
Δr6.7 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 3Argon) + Argon = (O- • 4Argon)

By formula: (O- • 3Ar) + Ar = (O- • 4Ar)

Quantity Value Units Method Reference Comment
Δr5.9 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 4Argon) + Argon = (O- • 5Argon)

By formula: (O- • 4Ar) + Ar = (O- • 5Ar)

Quantity Value Units Method Reference Comment
Δr5.0 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 5Argon) + Argon = (O- • 6Argon)

By formula: (O- • 5Ar) + Ar = (O- • 6Ar)

Quantity Value Units Method Reference Comment
Δr5.0 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 6Argon) + Argon = (O- • 7Argon)

By formula: (O- • 6Ar) + Ar = (O- • 7Ar)

Quantity Value Units Method Reference Comment
Δr4.2 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 7Argon) + Argon = (O- • 8Argon)

By formula: (O- • 7Ar) + Ar = (O- • 8Ar)

Quantity Value Units Method Reference Comment
Δr4. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 8Argon) + Argon = (O- • 9Argon)

By formula: (O- • 8Ar) + Ar = (O- • 9Ar)

Quantity Value Units Method Reference Comment
Δr4. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 9Argon) + Argon = (O- • 10Argon)

By formula: (O- • 9Ar) + Ar = (O- • 10Ar)

Quantity Value Units Method Reference Comment
Δr3. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 10Argon) + Argon = (O- • 11Argon)

By formula: (O- • 10Ar) + Ar = (O- • 11Ar)

Quantity Value Units Method Reference Comment
Δr2. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 11Argon) + Argon = (O- • 12Argon)

By formula: (O- • 11Ar) + Ar = (O- • 12Ar)

Quantity Value Units Method Reference Comment
Δr3. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 12Argon) + Argon = (O- • 13Argon)

By formula: (O- • 12Ar) + Ar = (O- • 13Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 13Argon) + Argon = (O- • 14Argon)

By formula: (O- • 13Ar) + Ar = (O- • 14Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 14Argon) + Argon = (O- • 15Argon)

By formula: (O- • 14Ar) + Ar = (O- • 15Ar)

Quantity Value Units Method Reference Comment
Δr2. ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 15Argon) + Argon = (O- • 16Argon)

By formula: (O- • 15Ar) + Ar = (O- • 16Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 16Argon) + Argon = (O- • 17Argon)

By formula: (O- • 16Ar) + Ar = (O- • 17Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 17Argon) + Argon = (O- • 18Argon)

By formula: (O- • 17Ar) + Ar = (O- • 18Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 18Argon) + Argon = (O- • 19Argon)

By formula: (O- • 18Ar) + Ar = (O- • 19Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 19Argon) + Argon = (O- • 20Argon)

By formula: (O- • 19Ar) + Ar = (O- • 20Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 20Argon) + Argon = (O- • 21Argon)

By formula: (O- • 20Ar) + Ar = (O- • 21Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 21Argon) + Argon = (O- • 22Argon)

By formula: (O- • 21Ar) + Ar = (O- • 22Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 22Argon) + Argon = (O- • 23Argon)

By formula: (O- • 22Ar) + Ar = (O- • 23Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 23Argon) + Argon = (O- • 24Argon)

By formula: (O- • 23Ar) + Ar = (O- • 24Ar)

Quantity Value Units Method Reference Comment
Δr0.4 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 24Argon) + Argon = (O- • 25Argon)

By formula: (O- • 24Ar) + Ar = (O- • 25Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

(O- • 25Argon) + Argon = (O- • 26Argon)

By formula: (O- • 25Ar) + Ar = (O- • 26Ar)

Quantity Value Units Method Reference Comment
Δr0.8 ± 8.4kJ/molN/AArnold, Hendricks, et al., 1995gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

Oxygen anion + Argon = (Oxygen anion • Argon)

By formula: O2- + Ar = (O2- • Ar)

Quantity Value Units Method Reference Comment
Δr6.95kJ/molN/ABowen and Eaton, 1988gas phase; Bound by 70 meV relative to EA(O2-.); B

Rubidium ion (1+) + Argon = (Rubidium ion (1+) • Argon)

By formula: Rb+ + Ar = (Rb+ • Ar)

Quantity Value Units Method Reference Comment
Δr8.49kJ/molIMobGatland, 1984gas phase; M
Δr8.28kJ/molIMobViehland, 1984gas phase; M
Δr11.9kJ/molIMobTakebe, 1983gas phase; M

Xe+ + Argon = (Xe+ • Argon)

By formula: Xe+ + Ar = (Xe+ • Ar)

Quantity Value Units Method Reference Comment
Δr17.kJ/molPIDehmer and Pratt, 1982gas phase; M
Δr25.kJ/molSIFTJones, Lister, et al., 1980gas phase; M
Δr13.kJ/molPINg, Tiedemann, et al., 1977gas phase; M
Quantity Value Units Method Reference Comment
Δr81.2J/mol*KSIFTJones, Lister, et al., 1980gas phase; M

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Site Links, NIST Free Links, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

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References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Site Links, NIST Free Links, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Streng, 1971
Streng, A.G., Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature, J. Chem. Eng. Data, 1971, 16, 357. [all data]

Gosman, McCarty, et al., 1969
Gosman, A.L.; McCarty, R.D.; Hust, J.G., Thermodynamic Properties of Argon from the Triple Point to 300 K at Pressures to 1000 Atmospheres, Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. NSRDS-NBS 27, 1969. [all data]

Van't Zelfde, Omar, et al., 1968
Van't Zelfde, P.; Omar, M.H.; LePair-Schroten, H.G.M.; Dokoupil, Z., Solid-liquid equilibrium diagram for the argon + methane system., Physica (Amsterdam), 1968, 38, 241-51. [all data]

Angus, Armstrong, et al., 1972
Angus, S.; Armstrong, B.; Gosman, A.L.; McCarty, R.D.; Hust, J.G.; Vasserman, A.A.; Rabinovich, V.A., International Thermodynamic Tables of the Fluid State - 1 Argon, Butterworths, London, 1972. [all data]

Ziegler, Mullins, et al., 1962
Ziegler, W.T.; Mullins, J.C.; Kirk, B.S., Calculation of the Vapor Pressure and Heats of Vaporization and Sublimation of Liquids and Solids, Especially Below One Atmosphere Pressure. II. Argon, Ga. Inst. Technol., Eng. Exp. Stn., Proj. A-460, Tech. Rep. No. 2, 1962. [all data]

Clark, Din, et al., 1951
Clark, A.M.; Din, F.; Robb, J.; Michels, A.; Wassenaar, T.; Zwietering, Th.N., The Vapor Pressure of Argon, Physica (Amsterdam), 1951, 17, 876. [all data]

Clusius and Weigand, 1940
Clusius, K.; Weigand, K., Melting Curves of the Gases A, Kr, Xe, CH4, CH3D, CD4, C2H4, C2H6, COS, and PH3 to 200 Atmospheres Pressure. The Chane of Volume on Melting, Z. Phys. Chem., Abt. B, 1940, 46, 1-37. [all data]

McCain and Ziegler, 1967
McCain, W.D., Jr.; Ziegler, W.T., The Critical Temperature, Critical Pressure, and Vapor Pressure of Argon, J. Chem. Eng. Data, 1967, 12, 2, 199-202, https://doi.org/10.1021/je60033a012 . [all data]

Drii and Rabinovich, 1966
Drii, L.I.; Rabinovich, V.A., Dependence of Vapor Pressure of Argon, Zh. Fiz. Khim., 1966, 40, 709-711. [all data]

van Itterbeek, Verbeke, et al., 1963
van Itterbeek, A.; Verbeke, O.; Staes, K., Measurements on the Equation of State of Liquid Argon and Methane Up to 300 kg cm-2 at Low Temperatures, Physica (Amsterdam), 1963, 29, 6, 742-754, https://doi.org/10.1016/S0031-8914(63)80231-1 . [all data]

Clark, Din, et al., 1951, 2
Clark, A.M.; Din, F.; Robb, J.; Michels, A.; Wassenaar, T.; Zwietering, Th., The Vapour Pressure of Argon, Physica (Amsterdam), 1951, 17, 10, 876-884, https://doi.org/10.1016/0031-8914(51)90041-9 . [all data]

McKnight and Sawina, 1973
McKnight, L.G.; Sawina, J.M., Equilibrium Constants and Binding Energies of Alkali Metal Ions with Inert Gases, Bull. Am. Phys. Soc., 1973, 18, 804. [all data]

Cassidy and Elford, 1985
Cassidy, R.A.; Elford, M.T., The Mobility of Li+ Ions in Helium and Argon, Aust. J. Phys., 1985, 38, 4, 587, https://doi.org/10.1071/PH850587 . [all data]

Keller, Beyer, et al., 1973
Keller, C.E.; Beyer, R.A.; Colonna-Romano, L.M., Clustering of Ar to Li+ and a Comparison of Drift - Tube Models, Phys. Rev. A, 1973, 8, 3, 1446, https://doi.org/10.1103/PhysRevA.8.1446 . [all data]

Teng and Conway, 1973
Teng, H.H.; Conway, D.C., Ion - Molecule Equilibria in Mixtures of N2 and Ar, J. Chem. Phys., 1973, 59, 5, 2316, https://doi.org/10.1063/1.1680338 . [all data]

Turner and Conway, 1979
Turner, D.L.; Conway, D.C., Study of the 2Ar + Ar2+ = Ar + Ar3+ Reaction, J. Chem. Phys., 1979, 71, 4, 1899, https://doi.org/10.1063/1.438544 . [all data]

Liu and Conway, 1975
Liu, W.F.; Conway, D.C., Ion - Molecule Reactions in Ar at 296, 195, and 77 K, J. Chem. Phys., 1975, 62, 8, 3070, https://doi.org/10.1063/1.430906 . [all data]

Kim and Bowers, 1990
Kim, H.S.; Bowers, M.T., Energetics, Structure and Photodissociation Dynamics of the Cluster Ar.N2+, J. Chem. Phys., 1990, 93, 2, 1158, https://doi.org/10.1063/1.459179 . [all data]

Hiraoka and Nakajima, 1988
Hiraoka, K.; Nakajima, G., A Determination of the Stabilities of N2+(N2)n and O2+(N2)n with n = 1 - 11 from Measurements of the Gas - Phase Ion Equilibria, J. Chem. Phys., 1988, 88, 12, 7709, https://doi.org/10.1063/1.454285 . [all data]

Gatland, 1984
Gatland, I.R., Swarms of Ions and Electrons in Gases, W. Lindinger, T. D. Mark and F. Howorka, eds. (Springer, New York, 1984, 1984, 44. [all data]

Gislason, 1984
Gislason, E.A., Quoted in I. R. Gatland in Swarms of Ions and Electrons in Gases, W. Lindinger, T. D. Mark and F. Howorka, eds. (Springer, New York, 1984, 1984, 44. [all data]

Viehland, 1984
Viehland, L.A., Interaction Potentials for Li+ - Rare - Gas Systems, Chem. Phys., 1984, 78, 2, 279, https://doi.org/10.1016/0301-0104(83)85114-3 . [all data]

Takebe, 1983
Takebe, M., The Generalized Mobility Curve for Alkali Ions in Rare Gases: Clustering Reactions and Mobility Curves, J. Chem. Phys., 1983, 78, 12, 7223, https://doi.org/10.1063/1.444763 . [all data]

Kemper, Hsu, et al., 1991
Kemper, P.R.; Hsu, M.T.; Bowers, M.T., Transition - Metal Ion - Rare Gas Clusters: Bond Strengths and Molecular Parameters for Co+(He/Ne)n, Ni+(He/Ne)n, and Cr+(He/Ne/Ar), J. Phys. Chem., 1991, 95, 26, 10600, https://doi.org/10.1021/j100179a022 . [all data]

Armentrout and Rodgers, 2000
Armentrout, P.B.; Rodgers, M.T., An Absolute Sodium Cation Affinity Scale: Threshold Collision-Induced Dissociation Experiments and ab Initio Theory, J. Phys. Chem A, 2000, 104, 11, 2238, https://doi.org/10.1021/jp991716n . [all data]

Hiraoka and Mori, 1989
Hiraoka, K.; Mori, T., Isotope Effect and Nature of Bonding in the Cluster Ions H3+(Ar)n and D3+(Ar)n, J. Chem. Phys., 1989, 91, 8, 4821, https://doi.org/10.1063/1.456720 . [all data]

Bedford and Smith, 1990
Bedford, D.K.; Smith, D., Variable-temperature selected ion flow tube studies of the reactions of Ar+, Ar2+ and ArHn+ (n=1-3) ions with H2, HD and D2 at 300 K and 80 K, Int. J. Mass Spectrom. Ion Proc., 1990, 98, 2, 179, https://doi.org/10.1016/0168-1176(90)85017-V . [all data]

Dehmer and Pratt, 1982
Dehmer, P.M.; Pratt, S.T., Photoionization of ArKr, ArXe, and KrXe and bond dissociation energies of the rare gas dimer ions, J. Chem. Phys., 1982, 77, 4804. [all data]

Jones, Lister, et al., 1980
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Notes

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