rubidium
- Formula: Rb
- Molecular weight: 85.4678
- IUPAC Standard InChI: InChI=1S/Rb
- IUPAC Standard InChIKey: IGLNJRXAVVLDKE-UHFFFAOYSA-N
- CAS Registry Number: 7440-17-7
- Chemical structure:
This structure is also available as a 2d Mol file - Permanent link for this species. Use this link for bookmarking this species for future reference.
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 19.3 ± 0.2 | kcal/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°gas | 19.34 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 40.6534 ± 0.0007 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| S°gas,1 bar | 40.652 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1983 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 970.385 - 1800. | 1800. - 6000. |
|---|---|---|
| A | 4.932990 | 17.71890 |
| B | 0.110379 | -9.377290 |
| C | -0.118264 | 2.367961 |
| D | 0.041508 | -0.162393 |
| E | 0.001048 | -8.398901 |
| F | 17.86440 | 1.187331 |
| G | 46.60091 | 51.21881 |
| H | 19.33560 | 19.33560 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1983 | Data last reviewed in December, 1983 |
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 |
|---|---|---|---|---|---|
| ΔfH°liquid | 0.521 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 20.02 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 18.35 ± 0.072 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 18.35 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1983 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 312.65 - 970.385 |
|---|---|
| A | 8.484052 |
| B | -3.076819 |
| C | 2.043511 |
| D | -0.000676 |
| E | -0.000028 |
| F | -1.888860 |
| G | 31.11370 |
| H | 0.521989 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1983 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. - 312.65 |
|---|---|
| A | 2.257711 |
| B | 15.60990 |
| C | 10.87770 |
| D | -6.402871 |
| E | -0.025748 |
| F | -1.536691 |
| G | 15.85700 |
| H | 0.000000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1983 |
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
( • 4294967295
) +
=
By formula: (Br- • 4294967295Rb) + Rb = Br-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 26.6 ± 1.0 | kcal/mol | Ther | Miller, Leopold, et al., 1986 | gas phase; Extrapolated by polarizability and radius from experimental data. |
(CAS Reg. No. 106070-95-5 • 4294967295) +
= CAS Reg. No. 106070-95-5
By formula: (CAS Reg. No. 106070-95-5 • 4294967295Rb) + Rb = CAS Reg. No. 106070-95-5
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 32.22 ± 0.25 | kcal/mol | N/A | Miller, Leopold, et al., 1986 | gas 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
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 Rb+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 4.17713 ± 0.000002 | eV | N/A | N/A | L |
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.485940 ± 0.000044 | LPD | Frey, Breyer, et al., 1978 | Given: 3919.18(16) cm-1; B |
| 0.4860 ± 0.0030 | LPES | Patterson, Hotop, et al., 1974 | B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 4.17713 | EVAL | Lide, 1992 | LL |
| 4.18 | PE | Williams and Potts, 1976 | LLK |
| 4.17713 ± 0.000002 | S | Moore, 1970 | RDSH |
Ion clustering data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry 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
( • 4294967295
) +
=
By formula: (Br- • 4294967295Rb) + Rb = Br-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 26.6 ± 1.0 | kcal/mol | Ther | Miller, Leopold, et al., 1986 | gas phase; Extrapolated by polarizability and radius from experimental data. |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry 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]
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]
Frey, Breyer, et al., 1978
Frey, P.; Breyer, F.; Hotop, H.,
High Resolutions Photodetachment from the Rubidium Negative Ion around the Rb(5p1/2) Threshold,
J. Phys. B: Atom. Mol. Phys., 1978, 11, 19, L589, https://doi.org/10.1088/0022-3700/11/19/005
. [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]
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]
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, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, NIST Free Links, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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