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Ytterbium Oxide at Western Minmetals Yb2O399.995% 1.Yb2O399.995%, REO99.0% 2.REO Impurity Max 0.05% 3.Other Impurity Fe2O3 0.0005%, SiO2 0.002%, CaO 0.001%, Cl- 0.05% Packing 25kg in cardboard drum