Scandium sulphite, Sc₂(SO₃)₃

Scandium sulphite, Sc₂(SO₃)₃, is obtained as a white precipitate by mixing solutions of scandium chloride and sodium sulphite (Crookes); by passing sulphur dioxide through an aqueous suspension of scandium hydroxide, the hexahydrate Sc₂(SO₃)₃.6H₂O, may be obtained. It is soluble in aqueous ammonium sulphite, and by evaporating the solution in an atmosphere of sulphur dioxide, scandium ammonium sulphite, Sc₂(SO₃)₃.(NH₄)₂SO₃.7H₂O, is obtained (Meyer and Drapier).