Beryllium oxalate

Beryllium oxalate is an inorganic compound, a salt of beryllium metal and oxalic acid with the chemical formula. It forms colorless crystals, dissolves in water, and also forms crystalline hydrates. The compound is used to prepare ultra-pure beryllium oxide by thermal decomposition.

Synthesis
The action of oxalic acid on beryllium hydroxide:


 * $$\mathsf{Be(OH)_2 + H_2C_2O_4 \ \xrightarrow{}\ BeC_2O_4 + 2H_2O }$$

Chemical properties
Crystalline hydrates lose water when heated:
 * $$\mathsf{BeC_2O_4\cdot 3H_2O \ \xrightarrow[-2H_2O]{100^oC}\ BeC_2O_4\cdot H_2O \ \xrightarrow[-H_2O]{220^oC}\ BeC_2O_4}$$