Caesium periodate, CsIO₄

The Caesium periodate, CsIO₄, is prepared by the action of caesium carbonate on periodic acid. It forms orthorhombic plates, not isomorphous with the corresponding salts of rubidium and potassium. It has a density of 4.259 at 15° C., and its solubility at 15° C. is 2.15 grams in 100 grams of water.