... It is also the raw material in making of metal cerium, and rare earth fluorescent materials. RE-impurities(%)Non-RE Impurities(%)La2O3 ... like: Lanthanum Oxide, Cerium Oxide, Praseodymium Oxide, Neodymium Oxide, Samarium Oxide, Europium Oxide, Gadolinium Oxide, Yttrium Oxide, Terbium Oxide, Dysprosium Oxide, Holmium Oxide, Erbium Oxide, Thulium Oxide, Ytterbium Oxide, Lutetium Oxide and so on ...