ferrocolumbite

ferrocolumbite
A black mineral that is an ore of niobium and tantalum
Syn: columbate, columbite, niobite

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  • Ferrocolumbite — Ferrocolumbite, also called niobite, niobite tantalite, 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… …   Wikipedia

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  • Ferrotantalite — Ferrotantalite, (Fe, Mn)(Ta, Nb)2O6 is a black mineral that is an ore of niobium and tantalum. It has a submetallic luster, a high specific gravity and is a tantalate of iron and manganese, containing niobate of iron. This mineral was first found …   Wikipedia

  • Manganite — This article is about the mineral of formula MnO(OH), for other uses of the term manganite see Manganite (disambiguation) Manganite Manganite, Ilfeld, Thuringia, Germany (size: 5.2×4.1×2.7 cm) Gener …   Wikipedia

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