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Calcium iodates are inorganic compound composed of calcium and iodate anion. Two forms are known, anhydrous Ca-IO3-2 and the hexahydrate Ca-IO3-2-H2O-. Both are colourless salts that occur naturally as the minerals called lautarite and bruggenite, respectively. A third mineral form of calcium iodate is dietzeite, a salt containing chromate with the formula Ca2-IO3-2CrO4. - Wikipedia