[3] It is a white, nearly insoluble salt that has the same crystal structure as LaF3.

It precipitates as a hydrate when fluoride ions are added to a weakly acidic Cm(III) solution; alternatively it can be synthesized by reacting hydrofluoric acid with Cm(OH)3.

The anhydrous form is then obtained by desiccation or by treatment with hydrogen fluoride gas.

[1] Curium fluoride can be prepared by in the reaction of curium with fluorine ions in an aqueous solution under weakly acidic conditions: Another possible preparation is the reaction of curium hydroxide with hydrofluoric acid, which also produces a hydrate of Curium fluoride.

[4] This inorganic compound–related article is a stub.