Columbite

（重定向自Manganocolumbite）

Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb₂O₆], is a black mineral group that is an ore of niobium. It has a submetallic luster and a high density and is a niobate of iron and manganese. This mineral group was first found in Haddam, Connecticut, in the United States. It forms a series with the tantalum-dominant analogue ferrotantalite and one with the manganese-dominant analogue manganocolumbite. The iron-rich member of the columbite group is ferrocolumbite. Some tin and tungsten may be present in the mineral. Yttrocolumbite is the yttrium-rich columbite with the formula (Y,U,Fe)(Nb,Ta)O₄. It is a radioactive mineral found in Mozambique.

单词	Manganocolumbite
释义	Manganocolumbite 英语百科 Columbite （重定向自Manganocolumbite） Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb₂O₆], is a black mineral group that is an ore of niobium. It has a submetallic luster and a high density and is a niobate of iron and manganese. This mineral group was first found in Haddam, Connecticut, in the United States. It forms a series with the tantalum-dominant analogue ferrotantalite and one with the manganese-dominant analogue manganocolumbite. The iron-rich member of the columbite group is ferrocolumbite. Some tin and tungsten may be present in the mineral. Yttrocolumbite is the yttrium-rich columbite with the formula (Y,U,Fe)(Nb,Ta)O₄. It is a radioactive mineral found in Mozambique.
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