molecular mass162.2 g/mol (anhydrous) 270.3 g/mol (hexahydrate)
Density 2.898 g/cm3 (anhydrous)1.82 g/cm3 (hexahydrate)
melting point306 °C (anhydrous)37 °C (hexahydrate)
Boiling point315 °C (anhydrous decomp)280 °C (hexahydrate decomp)
Solubility in water74.4 g/100 mL (0( °C92 g/100 mL (hexahydrate 20 °C)
Crystal structure hexagonal crystal family
Coordination geometry Octahedral