Holmium(III) chloride is the inorganic compound with the formula HoCl3.It exhibits the same color-changing behavior seen in holmium oxide, being a yellow in natural lighting and a bright pink color in fluorescent lighting.
Molar mass： 271.289 g/mol
Appearance： yellow crystals hygroscopic
Density： 3.7 g/cm3
Melting point： 720 °C (1,328 °F; 993 K)
Boiling point： 1,500 °C (2,730 °F; 1,770 K) (decomposes)
Solubility in water：dissolves
Crystal structure：Monoclinic, mS16
It is a common salt but is mainly used in research.