Columbite meaning

kə-lŭmbīt
A black, orthorhombic mineral, (Fe,Mn)(Nb,Ta)2O6, that is an ore of niobium and tantalum.
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A black, red-brown, or colorless mineral, essentially (Fe, Mn)(Nb, Ta)2 O6 , the principal ore of niobium.
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(mineralogy) A black mineral that is a mixed iron and manganese niobate and tantalate, and is the main ore of niobium and tantalum.
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Origin of columbite

  • columb(ium) –ite

    From American Heritage Dictionary of the English Language, 5th Edition