Holmium(III) fluoride


Holmium fluoride is an inorganic compound with a chemical formula of HoF3.

Preparation

Holmium fluoride can be produced by reacting holmium oxide and ammonium fluoride, then crystallising it from the ammonium salt formed in solution:
It can also be prepared by directly reacting holmium with fluorine:

Properties

Holmium fluoride is a yellowish powder that is insoluble in water. It has an orthorhombic [crystal system] with the space group Pnma. However, there is also a trigonal low-temperature form of the lanthanum(III) fluoride type.