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Calcium iodate

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.

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Further Information

Names

IUPAC nameCalcium diiodate

Other names

Lautarite

Identifiers

CAS Number: 7789-80-2

JSmol: Interactive image

ChemSpider: 23021

ECHA InfoCard: 100.029.265

EC Number: 232-191-3

E number: (glazing agents, …)

PubChem: 24619

Properties

Chemical formula: Ca(IO)32

Molar mass: 389.88 g/mol (anhydrous)
407.90 g/mol (monohydrate)

Appearance: white solid

Density: 4.519 g/cm (monohydrate)

Melting point: 540 °C (1,004 °F; 813 K) (monohydrate)

Boiling point: decomposes

Solubility in water: 0.09 g/100 mL (0 °C)
0.24 g/100 mL (20 °C)
0.67 g/100 mL (90 °C)

Solubility product: 7.110×−

Solubility: nitric acid

Magnetic susceptibility: -101.4·10 cm/mol−63

Structure

Crystal structure: monoclinic (anhydrous)
cubic (monohydrate)
orthorhombic (hexahydrate)

Hazards

Flash point: non-flammable

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).