thorium dioxide
- Formula: O2Th
- Molecular weight: 264.0369
- IUPAC Standard InChI: InChI=1S/2O.Th
- IUPAC Standard InChIKey: ZCUFMDLYAMJYST-UHFFFAOYSA-N
- CAS Registry Number: 1314-20-1
- Chemical structure:
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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 | -293.12 ± 0.84 | kcal/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 15.59 ± 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 |
|---|---|---|---|
| 8.7 ± 0.15 | EI | Rauh and Ackermann, 1974 | LLK |
| 8. ± 1. | EI | Hildenbrand and Murad, 1974 | LLK |
| 8.7 ± 0.15 | EI | Ackermann and Rauh, 1973 | LLK |
| 10.9 | EI | Il'ina, Rutgaizer, et al., 1967 | 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]
Hildenbrand and Murad, 1974
Hildenbrand, D.L.; Murad, E.,
Mass spectrometric studies of gaseous ThO and ThO2,
J. Chem. Phys., 1974, 61, 1232. [all data]
Ackermann and Rauh, 1973
Ackermann, R.J.; Rauh, E.G.,
High temperature properties of the thorium-oxygen system: a revision of the thermodynamic properties of ThO(g) and ThO2(g),
High Temp. Sci., 1973, 5, 463. [all data]
Il'ina, Rutgaizer, et al., 1967
Il'ina, G.G.; Rutgaizer, Yu.S.; Semenov, G.A.,
Ion source for mass spectral study of the energy characteristics of molecules,
Pribory i Tekhn. Ekrperim.,, 1967, 151, In original 158. [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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