Chromic Thioarsenite, 2Cr2S3.3AsS3, and chromic thioarsenate have been described by Berzelius.
By allowing solutions containing molecular proportions of alkali arsenate and chromic oxide, or of arsenic pentoxide and alkali chromate or dichromate, to crystallise, the following complex salts have been obtained:
2K2O.As2O5.4CrO3.H2O;
2(NH4)20.As2O5.4CrO3.H2O;
3(NH4)20.As2O5.8CrO3.H2O. |