coltan coltan (short for columbitetantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted. the niobiumdominant mineral in coltan is columbite (after niobium's original american name columbium), and the tantalumdominant mineral is the tantalite.. tantalum from coltan is used to manufacture tantalum capacitors which
mining industry of russia the mineral industry of russia is one of the world's leading mineral industries and accounts for a large percentage of the commonwealth of independent states' production of a range of mineral products, including metals, industrial minerals, and mineral fuels.in 05, russia ranked among the leading world producers or was a significant producer of a vast range of mineral commodities, including
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