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component of nigerian mining in industrial mineral type uses and location
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component of nigerian mining in industrial mineral type uses and location

Coltan is the colloquial name for the columbite-tantalum ("col-tan"); it is sometimes incorrectly as shorthand for tantalite, a metallic from which the very similar niobium, also known as ... The coltan is worth tens of millions of dollars a year. The price for coltan ranged between $50 and $200 ...

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