Niobium, formerly known as columbium, is a chemical element with the symbol Nb (formerly Cb) and atomic number 41. Niobium is a light grey, crystalline, and ductile transition metal.
N 6916 (OTTO) Niobium foil, 1.5 mm thick, 99.9% Cas 7440-03-1 - used to make colored jewelry. N 6916 (OTTO) Niobium foil, 1.5 mm thick, 99.9% Cas 7440-03-1 - used in the energy, chemical industries.