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C.F. Aver von Welsbach discovered neodymium in Austria in 1925. It was separated from the element didymium. The name neodymium is derived from the greek words neos meaning new and didymos meaning twin. It is obtained from electolysis of salts. It is used for coloring glass and ceramics, and for infrared radiation filtering. Physical Properties Density: 7.01 g/cm3 Tensile Strength: 78.4 N/mm2 Bending Strength: 245 N/mm2 Vickers Hardness: 600 D.P.N Compressive Strength: 1029 N/mm2 Youngs Modulus: 157 KN/mm2 Atomic Volume: 20.6 cm3/