Place of Origin : Hang Zhou,China

Coltan ore processing is a rare metal with a content of 0.0002% in the earth's crust, which is often co-existed with niobium in nature. Many minerala Contain tantalum mineral content, but seldom tantalum mineral mine(Ta/Nb = 1), with industrial value of the main minerals are: coltan[(Fe, Mn) (Ta, Nb) 2 o6], heavy tantalite (FeTa2O6).
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