Thorium oxalate is the
inorganic compound
In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...
with the formula Th(C
2O
4)
2(H
2O)
4. It is a white insoluble solid prepared by the reaction of thorium(IV) salts with an
oxalic acid
Oxalic acid is an organic acid with the systematic name ethanedioic acid and formula . It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water. Its name comes from the fact that early inve ...
. The material is a
coordination polymer
A coordination polymer is an inorganic or organometallic polymer structure containing metal cation centers linked by ligands. More formally a coordination polymer is a coordination compound with repeating coordination entities extending in 1, 2, o ...
. Each Th(IV) center is bound to 10 oxygen centers: eight provided by the bridging oxalates and two by a pair of
aquo ligand
In chemistry, metal aquo complexes are coordination compounds containing metal ions with only water as a ligand. These complexes are the predominant species in aqueous solutions of many metal salts, such as metal nitrates, sulfates, and perchlorat ...
s. Two additional
water of hydration
In chemistry, water(s) of crystallization or water(s) of hydration are water molecules that are present inside crystals. Water is often incorporated in the formation of crystals from aqueous solutions. In some contexts, water of crystallization is ...
are observed in the lattice.
The solubility product (K
sp) 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
Density of anhydrous thorium oxalate is 4.637 g/cm
3.
References
External links
International Bio-Analytical Industries: Thorium Oxalate Dihydrate
Thorium compounds
Oxalates
{{inorganic-compound-stub