Yttrium oxalate, Y₂(C₂O₄)₃

Yttrium oxalate, Y₂(C₂O₄)₃.9H₂O, is obtained by double decomposition as a white, crystalline precipitate.

The system Y2(C2O4)3 - K2C2O4 - H2O at 25° C. Solubility diagram.

The only stable yttrium potassium oxalate at 25° has the formula Y₂(C₂O₄)₃.4K₂SO₄.12H₂O, and is decomposed by water. Fig. shows the solubility diagram, as determined by Pratt and James.