Scandium is a silvery-white metal that oxidizes in air to a yellowish or pinkish tint. The metal is lightweight, soft, and ductile. It has a hexagonal close-packed structure, a density of 2.992 gm/cm3, a melting point of 1541 °C, and a boiling point of 2836 °C. Scandium oxide, or scandia, occurs as a trivalent ion and forms a sesquioxide with the formula Sc2O3. The oxide is a white powder with a specific gravity of 3.86 gm/cm3 and a formula weight of 137.9. Purity: Sc/TREM = 99.999% min Packing: In pails of 1~5 Kg net each, or packed according to customers' specifications.