| Ferric Ammonium Chromate, (NH4)2CrO4.Fe2(CrO4)3.4H2O, and ferric potassium chromate, K2CrO4.Fe2(CrO4)3.4H2O, have been prepared as dark red crystalline plates by the slow evaporation of mixed solutions of ferric chloride and ammonium (or potassium) dichromate. |