Thorium oxalate is the inorganic compound with the formula Th(C2O4)2(H2O)4. It is a white insoluble solid prepared by the reaction of thorium(IV) salts with oxalic acid.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 The material is a coordination polymer. Each Th(IV) center is bound to 10 oxygen centers: eight provided by the bridging oxalates and two by a pair of aquo ligands. Two additional waters of hydration are observed in the lattice.
The solubility product (Ksp) of thorium oxalate is 5.0110−25.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 The density of anhydrous thorium oxalate is 4.637 g/cm3.
References
External links Atomistry.com: Thorium oxalate info page International Bio-Analytical Industries: Thorium Oxalate Dihydrate