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Cesium

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Gas phase thermochemistry data

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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
Deltafgas76.5 ± 1.0kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafgas76.50kJ/molReviewChase, 1998Data last reviewed in June, 1968
Quantity Value Units Method Reference Comment
gas,1 bar175.601 ± 0.003J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar175.60J/mol*KReviewChase, 1998Data last reviewed in June, 1968

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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Temperature (K) 947.967 - 1000.1000. - 4000.4000. - 6000.
A 20.7860334.45424-181.0408
B -5.669112×10-8-13.7966179.98971
C 7.218238×10-84.132566-9.185764
D -3.086880×10-8-0.1377320.329954
E -3.919589×10-10-3.950387374.0571
F 70.3029258.22078517.6152
G 200.7542210.5447242.2787
H 76.5002676.5002676.50026
ReferenceChase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in June, 1968 Data last reviewed in June, 1968 Data last reviewed in June, 1968

Condensed phase thermochemistry data

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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
Deltafliquid2.09kJ/molReviewChase, 1998Data last reviewed in June, 1968
Quantity Value Units Method Reference Comment
liquid,1 bar92.07J/mol*KReviewChase, 1998Data last reviewed in June, 1968
Quantity Value Units Method Reference Comment
solid,1 bar85.23 ± 0.40J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
Quantity Value Units Method Reference Comment
solid85.15J/mol*KReviewChase, 1998Data last reviewed in June, 1968

Liquid 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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Temperature (K) 301.55 - 947.967
A 30.04635
B 0.506293
C 0.347554
D -0.099462
E 0.197109
F -6.234160
G 129.3768
H 2.087001
ReferenceChase, 1998
Comment Data last reviewed in June, 1968

Solid 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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Temperature (K) 298. - 301.55
A 57.04424
B -50.00340
C 48.55950
D -16.72822
E -1.223804
F -19.28397
G 160.2012
H 0.000000
ReferenceChase, 1998
Comment Data last reviewed in June, 1968

Phase change data

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

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
552. - 963.3.695763453.122-26.829Stull, 1947Coefficents calculated by NIST from author's data.

Reaction thermochemistry data

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

Data compiled by: 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.

Individual Reactions

(CAS Reg. No. 501951-35-5 bullet 4294967295Cesium) + Cesium = CAS Reg. No. 501951-35-5

By formula: (CAS Reg. No. 501951-35-5 bullet 4294967295Cs) + Cs = CAS Reg. No. 501951-35-5

Quantity Value Units Method Reference Comment
Deltar100. ± 4.2kJ/molTherMiller, Leopold, et al., 1986gas phase; Extrapolated by polarizability and radius from experimental data.

(Bromine anion bullet 4294967295Cesium) + Cesium = Bromine anion

By formula: (Br- bullet 4294967295Cs) + Cs = Br-

Quantity Value Units Method Reference Comment
Deltar124.7 ± 4.0kJ/molN/AMiller, Leopold, et al., 1986gas phase; Extrapolated by polarizability and radius from experimental data.

(CAS Reg. No. 131026-50-1 bullet 4294967295Cesium) + Cesium = CAS Reg. No. 131026-50-1

By formula: (CAS Reg. No. 131026-50-1 bullet 4294967295Cs) + Cs = CAS Reg. No. 131026-50-1

Quantity Value Units Method Reference Comment
Deltar44.7 ± 2.6kJ/molN/AMcHugh, Eaton, et al., 1989gas phase; Vertical Detachment Energy: 0.511±0.010 eV

(CAS Reg. No. 106070-96-6 bullet 4294967295Cesium) + Cesium = CAS Reg. No. 106070-96-6

By formula: (CAS Reg. No. 106070-96-6 bullet 4294967295Cs) + Cs = CAS Reg. No. 106070-96-6

Quantity Value Units Method Reference Comment
Deltar133. ± 9.6kJ/molN/AMiller, Leopold, et al., 1986gas phase

Gas phase ion energetics data

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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:
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
B - John E. Bartmess

View reactions leading to Cs+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)3.89390 ± 0.000002eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.471630 ± 0.000044N/AScheer, Tho/gersen, et al., 1998Given: 0.47164(6) eV; B
0.471630 ± 0.000044LPDSlater, Read, et al., 1978Given: 0.47160(25) eV; B
0.4700 ± 0.0030LPESPatterson, Hotop, et al., 1974B

Ionization energy determinations

IE (eV) Method Reference Comment
3.89390EVALLide, 1992LL
3.9EIBusse and Weil, 1982LBLHLM
3.89PEWilliams and Potts, 1976LLK
3.89EINygaard and Hahn, 1974LLK
3.89390 ± 0.000002SMoore, 1970RDSH

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, 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: John E. Bartmess

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

(Bromine anion bullet 4294967295Cesium) + Cesium = Bromine anion

By formula: (Br- bullet 4294967295Cs) + Cs = Br-

Quantity Value Units Method Reference Comment
Deltar124.7 ± 4.0kJ/molN/AMiller, Leopold, et al., 1986gas phase; Extrapolated by polarizability and radius from experimental data.

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, 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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Miller, Leopold, et al., 1986
Miller, T.M.; Leopold, D.G.; Murray, K.K.; Lineberger, W.C., Electron Affinities of the Alkali Halides and the Structure of their Negative Ions, J. Chem. Phys., 1986, 85, 5, 2368, https://doi.org/10.1063/1.451091 . [all data]

McHugh, Eaton, et al., 1989
McHugh, K.M.; Eaton, J.G.; Lee, G.H.; Sarkas, H.W.; Kidder, L.H.; Snodgrass, J.T.; Manaa, M.R.; Bowen, K.H., Photoelectron Spectra of the alkali metal cluster Anions: Na-,n=2-5, K-,n=2-7, Rb-,n=2-3, and Cs-,n=2-3, J. Chem. Phys., 1989, 91, 6, 3792, https://doi.org/10.1063/1.456861 . [all data]

Scheer, Tho/gersen, et al., 1998
Scheer, M.; Tho/gersen, J.; Bilodeau, R.C.; Brodie, C.A.; Haugen, H.K., Experimental Evidence that the 6s6p2Pj States of Cs- are Shape Resonances, Phys. Rev. Lett., 1998, 80, 4, 684, https://doi.org/10.1103/PhysRevLett.80.684 . [all data]

Slater, Read, et al., 1978
Slater, J.; Read, F.H.; Novick, S.E.; Lineberger, W.C., Alkali Negative Ions. III. Multichannel Photodetachment of Cs- and K-, Phys. Rev. A, 1978, 17, 1, 201, https://doi.org/10.1103/PhysRevA.17.201 . [all data]

Patterson, Hotop, et al., 1974
Patterson, T.A.; Hotop, H.; Kasdan, A.; Norcross, D.W.; Lineberger, W.C., Resonances in Alkali Negative-Ion Photodetachment and Electron Affinities of the Corresponding Neutrals, Phys. Rev. Lett., 1974, 32, 5, 189, https://doi.org/10.1103/PhysRevLett.32.189 . [all data]

Lide, 1992
Lide, D.R. (Editor), Ionization potentials of atoms and atomic ions in Handbook of Chem. and Phys., 1992, 10-211. [all data]

Busse and Weil, 1982
Busse, B.; Weil, K.G., Mass spectrometric studies on the vapour phase composition over solid and fused Cs3Sb, Ber. Bunsen-Ges. Phys. Chem., 1982, 86, 93. [all data]

Williams and Potts, 1976
Williams, T.A.; Potts, A.W., Complexities in the HeI photoelectron spectra of alkali metal vapours, J. Electron Spectrosc. Relat. Phenom., 1976, 8, 331. [all data]

Nygaard and Hahn, 1974
Nygaard, K.J.; Hahn, Y.B., Ion fluorescene in cesium, Physica, 1974, 75, 333. [all data]

Moore, 1970
Moore, C.E., Ionization potentials and ionization limits derived from the analyses of optical spectra, Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, NIST Free Links, References