Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. The name comes from Greek mythology: Niobe, daughter of Tantalus since it is so similar to tantalum
N 8469 (OTTO) Niobium, thermal spray grade, -325 mesh, powder, 99% Cas 7440-03-1 - used to deposit wear and corrosion resistant coatings on materials, such as ceramic and metallic layers.