Thulium Oxide Formula:Tm2O3;M.Wt:385.88 RE purity:min99.99% RE impurities:max100ppm La2O3max 1ppm CeO2max 1ppm Pr6O11max 1ppm Nd2O3max 1ppm Sm2O3max 1ppm Eu2O3max 1ppm Gd2O3max 1ppm Tb4O7max 1ppm Dy2O3max 1ppm Ho2O3max 10ppm Er2O3max 20ppm Yb2O3max 20ppm Lu2O3max 17ppm Y2O3max 10ppm TREO:min99% Non-RE impurities:Fe2O3 max 3ppm SiO2 max 20ppm CaO max 35ppm Cl- max190ppm Loss on ignition: min 1% DESCRIPION: Greenish white powder, insoluble in water, soluble in acids. USES: As an activator in phosphor, also for electronic industry and scientific research. PACKING: According to the requirements of clients.