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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.


Ferrocolumbite is a natural oxide of niobium, tantalum, ferrous iron, and manganese. Some tin and tungsten may be present in the mineral. Used for its heat resistancy.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ferrocolumbite". A list of authors is available in Wikipedia.
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