| Yttrium hydroxide, Y(OH)3, is obtained as a gelatinous precipitate from solutions of yttrium salts by the addition of excess of a soluble hydroxide. It readily absorbs carbon dioxide. When the precipitant is a mixture of ammonia and hydrogen peroxide, hydrated yttrium peroxide, Y4O9.xH2O or perhaps Y2O5.xH2O, is produced. |