Columbite
[kuh-luhm-bahyt] /kəˈlʌm baɪt/
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.
/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)2O6 Also called niobite
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[kuh-luhm-bee-uh m] /kəˈlʌm bi əm/ noun, Chemistry. 1. (formerly) niobium. Symbol: Cb. /kəˈlʌmbɪəm/ noun 1. the former name of niobium
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[kuh-luhm-buh s] /kəˈlʌm bəs/ adjective, Chemistry. 1. . /kəˈlʌmbəs/ adjective 1. another word for niobous
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