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Uranyl Selenate, UO2SeO4

Uranyl Selenate, UO2SeO4.xH2O, is present in the glassy mass obtained by evaporating a solution of uranyl hydroxide in selenic acid. It has not been obtained in a pure state. Such solutions also yield acid salts, of which the following have been isolated:

UO2SeO4.H2SeO4.18H2O,
2UO2SeO4.H2SeO4.12H2O.

Double selenates, of composition R2SeO4.UO2SeO4.2H2O (R = K, NH4), have been obtained in crusts of yellow crystals by evaporation of solutions of the alkali uranate in selenic acid.

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