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columbite

[ kuh-luhm-bahyt ]

noun

  1. a black, crystalline mineral, iron niobate, (Fe, Mn)Nb 2 O 6 , the principal ore of niobium, an end member of a series of solid solutions in which manganese and tantalum combine to form tantalite.


columbite

/ kəˈlʌmbaɪt /

noun

  1. a black mineral consisting of a niobium oxide of iron and manganese in orthorhombic crystalline form: occurs in coarse granite, often with tantalite, and is an ore of niobium. Formula: (Fe, Mn)(Nb) 2 O 6 Also calledniobite


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Word History and Origins

Origin of columbite1

First recorded in 1795–1805; columb(ium) + -ite 1
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Word History and Origins

Origin of columbite1

C19: from columbium + -ite 1
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Example Sentences

Columbium pentoxide (columbic acid), Cb2O5, is obtained from columbite, after the removal of tantalum (see above).

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columbinecolumbium