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Columbite - Wikipedia , Columbite, also called niobite, niobite-tantalite and columbate [(Fe,Mn)Nb 2O 6], is a black mineral group that is an ore of niobium. It has a submetallic luster and ...

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columbite-tantalite (“coltan”) - Society for Geology Applied to Mineral ... , Oct 31, 2008 ... of the columbite-tantalite group [(Fe,Mn). (Nb,Ta)2O6]. ... John Moore (South Africa) 194. 4 ... technical equipment for ore processing used.

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Columbite - Wikipedia , Columbite, also called niobite, niobite-tantalite and columbate [(Fe,Mn)Nb 2O 6], is a black mineral group that is an ore of niobium. It has a submetallic luster and ...

Coltan - Wikipedia , Coltan is a dull black metallic ore from which are extracted the elements niobium and tantalum. ... A 2005 report on the Rwandan economy by the South African Institute for ... so some processors, Cabot Corporation (USA) for example, have announced ... Cement ·...

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columbite-tantalite (“coltan”) - Society for Geology Applied to Mineral ... , Oct 31, 2008 ... of the columbite-tantalite group [(Fe,Mn). (Nb,Ta)2O6]. ... John Moore (South Africa) 194. 4 ... technical equipment for ore processing used.

Towards sustainable processing of columbite group minerals - NCBI , Dec 21, 2017 ... However, the current processing methods for niobium and tantalum ... low temperature superconductor (LTS) wires for medical equipment (i.e. ... S Kingman, C. Dodds and A. Jha contributed to the discussion of the results and coordination of the work. ...

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