Coltan - WikipediaColtan is a dull black metallic ore, from which the elements niobium and tantalum are extracted. . Tantalum from coltan is used to manufacture batteries for electric cars, and in tantalum capacitors it is used in electronic products. Coltan mining.tantalite ore used,Coltan / Columbite-Tantalite Powder (Fe++Ta2O6)Columbite-tantalite — coltan for short — is a dull metallic ore found in major quantities . The principal ore of niobium and tantalum, used mostly as an additive in.
tantalite ore used