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Dysprosium(III) chloride (DyCl3), also known as dysprosium trichloride, is a compound of dysprosium and chlorine. It is a white to yellow solid which rapidly absorbs water on exposure to moist air to form a hexahydrate, DyCl3.6H2O.

Chemical formula:DyCl3

Molar mass: 268.86 g/mol (anhydrous)

Appearance: white solid

Density: 3.67 g/cm3, solid

Melting point: 647 °C (1,197 °F; 920 K) (anhydrous)

Boiling point: 1,530 °C (2,790 °F; 1,800 K)

Solubility in water:Soluble

Crystal structure:AlCl3 structure


Dysprosium(III) chloride can be used as a starting point for the preparation of other dysprosium salts. Dysprosium metal is produced when a molten mixture of DyCl3 in eutectic LiCl-KCl is electrolysed. The reduction occurs via Dy2+, at a tungsten cathode.