Ceric carbonate

A yellow, gelatinous precipitate, presumably of a basic ceric carbonate, is obtained by double decomposition between a ceric salt and an alkali carbonate. The precipitate dissolves readily in concentrated potassium carbonate solution, forming a yellow solution that is stable in the air but which may be oxidised with hydrogen peroxide. The basic ceric carbonates, 2CeO₂.3CO₂ and 2CeO₂.CO₂, are obtained (combined with potassium carbonate)? by heating perceric potassium carbonate to 240° and 360° respectively.