Niobio

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.

Properties

• Phase: Solid
• Density: 8.57 g/cm³
• Melting Point: 2750 K
• Boiling Point: 5017 K

Uses