Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.
L 7083 (OTTO) Lutetium pieces, 3-5 mm, 99.9% Cas 7439-94-3 - used as an additive for special steel, non-ferric alloy, hydrogen storage alloy, also reducer for making other rare Earth metal.