Beryllium oxide
- Formula: Be4O4
- Molecular weight: 100.0463
- IUPAC Standard InChI: InChI=1S/Be.O/q+2;-2
- IUPAC Standard InChIKey: QRPNDIYNTUICCP-UHFFFAOYSA-N
- CAS Registry Number: 61279-74-1
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Species with the same structure:
- Information on this page:
- Options:
Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, 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 | -380.000 | kcal/mol | Review | Chase, 1998 | Data last reviewed in September, 1963 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 72.318 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1963 |
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) | 298. to 600. | 600. to 6000. |
|---|---|---|
| A | -14.45330 | 41.28100 |
| B | 160.1150 | 1.660081 |
| C | -180.7060 | -0.388775 |
| D | 77.15280 | 0.030032 |
| E | 0.186529 | -3.087030 |
| F | -380.7381 | -401.6090 |
| G | 15.48760 | 107.5560 |
| H | -380.0000 | -380.0000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1963 | Data last reviewed in September, 1963 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, 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:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.0 | EI | Chupka, Berkowitz, et al., 1959 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Chupka, Berkowitz, et al., 1959
Chupka, W.A.; Berkowitz, J.; Giese, C.F.,
Vaporization of beryllium oxide and its reaction with tungsten,
J. Chem. Phys., 1959, 30, 827. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.