Thorium oxalate
| Identifiers | |
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| ECHA InfoCard | 100.016.400 |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| C4O8Th | |
| Molar mass | 408.07 g/mol 444.114 g/mol (dihydrate) |
| Density | 4.637 g/cm3 (anhydrous) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thorium oxalate is a white insoluble compound of thorium that is prepared by mixing a thorium nitrate solution in acid medium with an oxalic acid solution.
By mixing 0.5 M thorium nitrate solution with 0.5 M oxalic acid solution at room temperature thorium oxalate dihydrate ( Th(C2O4)2.2H2O ) is obtained. Thorium oxalate hexahydrate is obtained when precipitated from 2 M nitric acid solution. On heating to 500° it is converted to thorium oxide.[1] The solubility product (Ksp) of thorium oxalate is 5.01 X 10−25[2] Density of anhydrous thorium oxalate is 4.637 g/cm3.
References
- ^ Enver Oktay, Ahmet Yayli (2001) Physical properties of thorium oxalate powders and their influence on the thermal decomposition Journal of Nuclear Materials Volume 288, Issue 1, January 2001, Pages 76–82
- ^ Taishi KOBAYASHI, Takayuki SASAKI, Ikuji TAKAGI & Hirotake MORIYAMA (2009) Solubility of Thorium(IV) in the Presence of Oxalic and Malonic Acids Journal of Nuclear Science and Technology, Vol. 46, No. 11, p. 1085–1090
External links
- Atomistry.com: Thorium oxalate info page
- International Bio-Analytical Industries: Thorium Oxalate Dihydrate
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