Tantalite ((Fe Mn)(Ta Nb) 2 O 6 Iron Manganese Tantalum Niobium Oxide) is the most widespread tantalum mineral and makes for an important ore of the industrially useful metalTantalum (Ta) is a gray heavy and extremely hard metal When pure it is ductile and can be drawn into fine wire which is used as a filament for evaporating metals such as ...
