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Atomistry » Scandium » Chemical Properties » Scandium oxalate | ||||
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Scandium oxalate, Sc2(C2O4)3
Boiling 10 per cent, hydrochloric acid dissolves 0.8 per cent, of its weight of hydrated scandium oxalate; the 20 per cent, acid, 1.8 per cent, of oxalate (Meyer and Winter). When dried over sulphuric acid, the trihydrate, Sc2(C2O4)3.3H2O, is obtained; at 100° the dihydrate, and at 140° the monohydrate is produced (Crookes). Scandium oxalate dissolves readily in hot ammonium oxalate solution, less readily in potassium or sodium oxalate, and on cooling, crystalline double oxalates of the type Sc2(C2O4)3.3R2IC2O4.10H2O, or R3I[Sc(C2O4)3].5H2O, separate out. Scandium oxalate has a strong tendency towards double salt formation, and when a solution of sodium or potassium oxalate is added to one of scandium nitrate, the crystalline precipitate first produced is a double oxalate of the type Sc2(C2O4)3.R2IC2O4 (Meyer and Wassjuchnow). |
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