Erbium Oxide Formula:Er2O3;M.Wt:377.88 RE purity:min99.9% RE impurities: La2O3 max 1ppm CeO2 max 1ppm Pr6O11 max 1ppm Nd2O3 max 1ppm Sm2O3 max 1ppm Eu2O3 max 1ppm Gd2O3 max 1ppm Tb4O7 max 1ppm Dy2O3 max 10ppm Ho2O3 max 230ppm Tm2O3 max 25ppm Yb2O3 max 10ppm Lu2O3 max 10ppm Y2O3 max 560ppm TREO:min99% Non-RE impurities:Fe2O3 max 5ppm SiO2 max 25ppm CaO max 33ppm Cl- max200ppm Loss on ignition: min1% DESCRIPION: peach powder, insoluble in water, soluble in acids. USES: As neutron-controlling material for nuclear reactors and pigment for glassware. PACKING: According to the requirements of clients.