Cadmium Dichromate, CdCr₂O₇

Cadmium Dichromate, CdCr₂O₇.H₂O, is difficult to crystallise from its solutions, but has been obtained by evaporating a solution of cadmium carbonate in chromic acid under reduced pressure.

The crystals are orange and their aqueous solution easily decomposes. Dark red deliquescent crystalline crusts of a trichrornate, CdO.3CrO₃.H₂O, have been obtained from such decomposed solutions.

The salt, CdCr₂O₇.2Hg(CN)₂.7H₂O, has been obtained, and the double salt, K₂Cr₂O₇.CdCr₂O₇.2H₂O.