beryllium
- Formula: Be
- Molecular weight: 9.012182
- IUPAC Standard InChI: InChI=1S/Be
- IUPAC Standard InChIKey: ATBAMAFKBVZNFJ-UHFFFAOYSA-N
- CAS Registry Number: 7440-41-7
- Chemical structure:
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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 |
|---|---|---|---|---|---|
| ΔfH°gas | 324. ± 5. | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°gas | 324.00 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 136.275 ± 0.003 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| S°gas,1 bar | 136.27 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 2741.437 - 6000. |
|---|---|
| A | 28.57195 |
| B | -5.384682 |
| C | 1.038152 |
| D | -0.012100 |
| E | -4.261321 |
| F | 308.1788 |
| G | 164.2404 |
| H | 324.0002 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 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 | 15.51 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 19.54 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 9.50 ± 0.08 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 9.44 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 1560. - 2741.437 |
|---|---|
| A | 25.42516 |
| B | 2.157952 |
| C | -0.002573 |
| D | 0.000287 |
| E | 0.003958 |
| F | 5.442045 |
| G | 44.49433 |
| H | 15.50804 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. - 1527. | 1527. - 1560. |
|---|---|---|
| A | 21.20694 | 30.00037 |
| B | 5.688190 | -0.000396 |
| C | 0.968019 | 0.000169 |
| D | -0.001749 | -0.000026 |
| E | -0.587526 | -0.000105 |
| F | -8.554858 | -6.970377 |
| G | 30.06007 | 40.76178 |
| H | 0.000000 | 0.000000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1983 | Data last reviewed in September, 1983 |
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
View reactions leading to Be+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 9.32263 | eV | N/A | N/A | L |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.32263 | EVAL | Lide, 1992 | LL |
| 9.323 | S | Kelly, 1987 | LBLHLM |
| 9.2 ± 1.0 | EI | Farber and Srivastava, 1974 | LLK |
| 9.32263 | S | Moore, 1970 | RDSH |
| 9.4 ± 0.2 | EI | Hildenbrand and Theard, 1969 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics 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]
Lide, 1992
Lide, D.R. (Editor),
Ionization potentials of atoms and atomic ions
in Handbook of Chem. and Phys., 1992, 10-211. [all data]
Kelly, 1987
Kelly, R.L.,
Atomic and ionic spectrum lines of hydrogen through kryton,
J. Phys. Chem. Ref. Data, 1987, 16. [all data]
Farber and Srivastava, 1974
Farber, M.; Srivastava, R.D.,
Dissociation energies of BeF and BeCl and the heat of formation of BeClF,
J. Chem. Soc. Faraday Trans. 1, 1974, 70, 1581. [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]
Hildenbrand and Theard, 1969
Hildenbrand, D.L.; Theard, L.P.,
Mass spectrometric measurement of the dissociation energies of BeCi and BeCl2,
J. Chem. Phys., 1969, 50, 5350. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, NIST Free Links, References
- Symbols used in this document:
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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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