uranium dioxide
- Formula: O2U
- Molecular weight: 270.0277
- CAS Registry Number: 1344-57-6
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Condensed 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°solid | -259.32 ± 0.24 | kcal/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 18.41 ± 0.048 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
Gas phase ion energetics data
Go To: Top, Condensed 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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 5.4 ± 0.1 | EI | Rauh and Ackermann, 1974 | LLK |
| 4.5 ± 1.5 | EI | Blackburn and Danielson, 1972 | LLK |
| 5.5 ± 0.4 | EI | Pattoret, Drowart, et al., 1968 | RDSH |
| 5.5 ± 0.1 | EI | Mann, 1964 | RDSH |
| 4.3 ± 0.6 | EI | DeMaria, Burns, et al., 1960 | RDSH |
References
Go To: Top, Condensed 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.
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]
Rauh and Ackermann, 1974
Rauh, E.G.; Ackermann, R.J.,
First ionization potentials of some refractory oxide vapors,
J. Chem. Phys., 1974, 60, 1396. [all data]
Blackburn and Danielson, 1972
Blackburn, P.E.; Danielson, P.M.,
Electron impact relative ionization cross sections fragmentation of U, UO, UO2, and UO3,
J. Chem. Phys., 1972, 56, 6156. [all data]
Pattoret, Drowart, et al., 1968
Pattoret, A.; Drowart, J.; Smoes, S.,
Etudes thermodynamiques par spectrometrie de masse sur le systeme uranium-oxygene
in Thermodyn. Nucl. Mater. Proc. Symp., 1967 Vienna, 1968, 613. [all data]
Mann, 1964
Mann, J.B.,
Ionization of U, UO, and UO2 by electron impact,
J. Chem. Phys., 1964, 40, 1632. [all data]
DeMaria, Burns, et al., 1960
DeMaria, G.; Burns, R.P.; Drowart, J.; Inghram, M.G.,
Mass spectrometric study of gaseous molybdenum, tungsten, and uranium oxides,
J. Chem. Phys., 1960, 32, 1373. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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