Lutetium(III) fluoride

Lutetium(III) fluoride is an inorganic compound with a chemical formula LuF3.

Production
Lutetium(III) fluoride can be produced by reacting lutetium oxide with hydrogen fluoride, or reacting lutetium chloride and hydrofluoric acid:


 * Lu2O3 + 6 HF → 2 LuF3 + 3 H2O
 * LuCl3 + 3 HF → LuF3 + 3 HCl

It can also be produced by reacting lutetium sulfide and hydrofluoric acid:


 * (x = 0.9)
 * (H3O)Lu3F10 → 3 LuF3 + HF↑ + H2O↑

Lutetium oxide and nitrogen trifluoride react at 240 °C to produce LuOF. A second step happens below 460 °C to produce LuF3.