Thorium dioxide
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| Thorium dioxide | |
|---|---|
| Other names | Thorium(IV) oxide Thoria Thorianite |
| Identifiers | |
| InChI | InChI=1/2O.Th/q2*-2;+4 |
| InChIKey | DNNLEMIRRGUGOZ-UHFFFAOYAA |
| Standard InChI | InChI=1S/2O.Th/q2*-2;+4 |
| Standard InChIKey | DNNLEMIRRGUGOZ-UHFFFAOYSA-N |
| CAS number | [] |
| EC number | |
| ChemSpider | |
| Properties[1] | |
| Chemical formula | ThO2 |
| Molar mass | 264.04 g mol−1 |
| Appearance | white solid |
| Density | 9.86 g cm−3 |
| Melting point |
3220(50) °C |
| Boiling point |
ca. 4400 °C |
| Solubility in water | insoluble |
| Structure[2] | |
| Space group | Fm3m |
| Lattice constant | a = 559.2 pm |
| Thermochemistry[3] | |
| Std enthalpy of formation ΔfH |
−1226.4(35) kJ mol−1 |
| Standard molar entropy S |
65.23(20) J K−1 mol−1 |
| Related compounds | |
| Other anions | Thorium disulfide Thorium diselenide Thorium ditelluride |
| Other cations | Protactinium dioxide Uranium dioxide Zirconium dioxide Hafnium dioxide |
| Other compounds | Thorium monoxide Thorium sesquioxide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
Thorium dioxide, ThO2, also known as thoria, is the main oxide of thorium.
Notes and references
Notes
References
- ↑ CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-157. ISBN 0-8493-0462-8
- ↑ Wickleder, Mathias S.; Fourest, Blandine; Dorhout, Peter K. Thorium. In The Chemistry of the Actinide and Transactinide Elements, 3rd ed.; Morss, Lester R.; Edelstein, Norman M.; Fuger, Jean, Eds.; Springer: Dordrecht, the Netherlands, 2006; Vol. 1, Chapter 3, pp 52–160. doi:10.1007/1-4020-3598-5_3, <http://radchem.nevada.edu/classes/rdch710/files/thorium.pdf>.
- ↑ Thorium dioxide. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/2O.Th>. (accessed 9 January 2011).
External links
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