Rhodium(III) fluoride or rhodium trifluoride is the inorganic compound with the formula RhF3. It is a red-brown, diamagnetic solid.
The compound is prepared by fluorination of rhodium trichloride:
It can also be obtained by direct combination of the elements:
Anhydrous is insoluble in water and does not react with it, but the hydrates and can be prepared by adding hydrofluoric acid to aqueous rhodium(III) solutions.
According to X-ray crystallography, the compound adopts the same structure as vanadium trifluoride, wherein the metal achieves octahedral coordination geometry.[1]