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:
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:
- Data at other public NIST sites:
- Options:
Condensed phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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 | -1226.4 ± 3.5 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 65.23 ± 0.20 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
Gas phase ion energetics data
Go To: Top, Condensed phase thermochemistry data, Vibrational and/or electronic energy levels, 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 |
Vibrational and/or electronic energy levels
Go To: Top, Condensed phase thermochemistry data, 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.
Data compiled by: Marilyn E. Jacox
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a1 | 1 | Sym. stretch | 808.4 | Ne | IR | Zhou and Andrews, 1999 | |
| 1 | Sym. stretch | 787.3 | Ar | IR | Gabelnick, Reedy, et al., 1974 Kushto and Andrews, 1999 | ||
| b2 | 3 | Asym. stretch | 756.7 | Ne | IR | Zhou and Andrews, 1999 | |
| 3 | Asym. stretch | 735.0 | Ar | IR | Gabelnick, Reedy, et al., 1974 Kushto and Andrews, 1999 | ||
Additional references: Jacox, 1998, page 179; Jacox, 2003, page 110
References
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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]
Zhou and Andrews, 1999
Zhou, M.; Andrews, L.,
Infrared spectra and pseudopotential calculations for NUO[sup +], NUO, and NThO in solid neon,
J. Chem. Phys., 1999, 111, 24, 11044, https://doi.org/10.1063/1.480463
. [all data]
Gabelnick, Reedy, et al., 1974
Gabelnick, S.D.; Reedy, G.T.; Chasanov, M.G.,
Infrared spectra and structure of some matrix-isolated lanthanide and actinide oxides,
J. Chem. Phys., 1974, 60, 3, 1167, https://doi.org/10.1063/1.1681128
. [all data]
Kushto and Andrews, 1999
Kushto, G.P.; Andrews, L.,
Infrared Spectroscopic and Density Functional Theoretical Investigation of the Reaction Products of Laser-Ablated Zr, Hf, and Th Atoms with Nitric Oxide,
J. Phys. Chem. A, 1999, 103, 25, 4836, https://doi.org/10.1021/jp9905732
. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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
- 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.