Cadmium selenateCadmium selenate is a selenate of cadmium, with the chemical formula CdSeO4.PreparationCadmium selenate can be formed by the reaction of cadmium oxide and selenic acid. The product is a mixture of monohydrate and dihydrate.PropertiesCadmium selenate dihydrate is a colorless solid. At 100 °C, the dihydrate releases water of crystallization to form cadmium selenate monohydrate. The monohydrate is monoclinic with space group P21/c, while the dihydrate is orthorhombic, with space group Pbca.