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    What Are Conflict Minerals? The term "conflict minerals" is defined as columbite-tantalite, also known as coltan (from which tantalum is derived); cassiterite (tin); gold; wolframite (tungsten); or their derivatives; or any other mineral or its derivatives determined by the Secretary of State to be financing conflict in the Democratic Republic of the …

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    No known benefits for life processes in plants and animals. Sources. Tantalum is chiefly obtained as a by-product of tin processing, although it is also mined from the minerals columbite, tantalite and samarskite.

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    Physical Description Metal: Steel-blue to gray solid or black, odorless powder.

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  • Tantalum | Minerals Education Coalition

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    Columbite definition, 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. See more.

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  • Columbite Tantalite Air - manabadischools9indiaresults …

    Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite (after niobium's original American name, columbium), and the tantalum-dominant mineral is tantalite.

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  • COLTAN Tanzania Other Ore - WeiKu.com

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