Discover

(Redirected from Niobite)
'Ferrocolumbite', also called 'niobite, columbate' and 'columbite' [(Fe, Mn)(Nb, Ta)₂O₆] is a black mineral that is an ore of niobium and tantalum. It has a submetallic luster and a high specific gravity and is a niobate of iron and manganese, containing tantalate of iron. This mineral was first found at Haddam, Middlesex County, Connecticut in New England, USA. It forms a series with the tantalum-dominant analogue Ferrotantalite and one with the manganese-dominant analogue 'Manganocolumbite'.