germanium
- Formula: Ge
- Molecular weight: 72.64
- IUPAC Standard InChI: InChI=1S/Ge
- IUPAC Standard InChIKey: GNPVGFCGXDBREM-UHFFFAOYSA-N
- CAS Registry Number: 7440-56-4
- 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.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- NIST Atomic Spectra Database - Lines Holdings (on physics web site)
- NIST Atomic Spectra Database - Levels Holdings (on physics web site)
- NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
- Options:
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 |
|---|---|---|---|---|---|
| ΔfH°gas | 372. ± 8. | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 167.904 ± 0.005 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
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 |
|---|---|---|---|---|---|
| S°solid,1 bar | 31.09 ± 0.15 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
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 as indicated in comments:
MS - José A. Martinho Simões
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.
Individual Reactions
HGe (g) = (g) +
(g)
By formula: HGe (g) = H (g) + Ge (g)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | >225. | kJ/mol | PIMS | Ruscic, Schwarz, et al., 1990 | Temperature: 0 K. A value of 264. kJ/mol is recommended in Ruscic, Schwarz, et al., 1990.; MS |
(CAS Reg. No. 64177-44-2 • 4294967295) +
= CAS Reg. No. 64177-44-2
By formula: (CAS Reg. No. 64177-44-2 • 4294967295Ge) + Ge = CAS Reg. No. 64177-44-2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 341. ± 10. | kJ/mol | N/A | Arnold, Xu, et al., 1995 | gas phase; B |
By formula: (Ge3- • 4294967295Ge) + Ge = Ge3-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 386. ± 10. | kJ/mol | N/A | Burton, Xu, et al., 1996 | gas phase; B |
(CAS Reg. No. 78413-15-7 • 4294967295) +
= CAS Reg. No. 78413-15-7
By formula: (CAS Reg. No. 78413-15-7 • 4294967295Ge) + Ge = CAS Reg. No. 78413-15-7
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 335. ± 5.9 | kJ/mol | N/A | Burton, Xu, et al., 1996 | gas phase; B |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, 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]
Ruscic, Schwarz, et al., 1990
Ruscic, B.; Schwarz, M.; Berkowitz, J.,
Photoionization studies of GeHn(n = 2-4),
J. Chem. Phys., 1990, 92, 1865. [all data]
Arnold, Xu, et al., 1995
Arnold, C.C.; Xu, C.S.; Burton, G.R.; Neumark, D.M.,
Study of the low-lying states of Ge-2 and Ge-2(-) using negative ion zero electron kinetic energy spectroscopy,
J. Chem. Phys., 1995, 102, 18, 6982, https://doi.org/10.1063/1.469091
. [all data]
Burton, Xu, et al., 1996
Burton, G.R.; Xu, C.; Arnold, C.C.; Neumark, D.M.,
Photoelectron Spectroscopy and Zero Kinetic Energy Spectroscopy of Germanium Cluster Anions,
J. Chem. Phys., 1996, 104, 8, 2757, https://doi.org/10.1063/1.471098
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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