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.
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.