Coltan - Wikipedia
Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is tantalite. [1]
What is Coltan? 5 Facts to Know About the Conflict Mineral …
2024年8月22日 · Tantalum, after its extraction from coltan, is used in electronics due to its high density, superior conductivity and excellent thermal properties.
Coltan | Earth Sciences Museum | University of Waterloo
Coltan is short for columbite-tantalite, a dull metallic ore. When refined, coltan becomes a heat resistant powder, metallic tantalum, which has unique properties for storing electrical charge. Coltan occurs in granitic pegmatites, pockets where the deep seated molten rock crystallized last.
Tantalum supply from artisanal and small-scale mining: A mineral ...
2020年12月1日 · The Great Lakes region's artisanal tantalum ore concentrates are commonly referred to by its informal trade name, coltan, which comprises variable proportions of different tantalum (-niobium) ore minerals.
Columbite-tantalite (COLTAN) - Engineering.com
2006年10月17日 · COLTAN (Columbite-Tantalite) is a dull metallic ore found in major quantities in the eastern areas of Congo. When refined, COLTAN becomes metallic Tantalum, a heat-resistant powder that can hold a high electrical charge.
Tantalum (Ta) - Definition, Preparation, Properties, Uses
2024年7月11日 · Coltan Separation: Tantalum is primarily extracted from the mineral coltan (columbite-tantalite), where it is found alongside niobium. The refinement process involves separating tantalum from niobium and other minerals due to their different chemical properties.
Coltan mining and ethics - Wikipedia
Coltan is the colloquial name for the mineral columbite-tantalum ("col-tan"). In the early 21st century coltan mining is associated with human rights violations such as child labour , systematic exploitation of the population by governments or militant groups, exposure to toxic chemicals and other hazards as a result of lax environmental ...
1 Key facts and figures about coltan and tantalum - JSTOR
1 Key facts and figures about coltan and tantalum (pp. 15-28) 2 The Democratic Republic of Congo (pp. 29-41) 3 Coltan mining in the DRC (pp. 43-53) 4 Coltan's connections to the conflict in the DRC (pp. 55-66) 5 Policy initiatives (pp. 67-83) 6 Conclusion (pp. 85-87) Appendix A: Tantalum mining (pp. 89-92)
Coltan - chemeurope.com
Coltan is the colloquial African name for columbite-tantalite, a metallic ore used to produce the elements niobium and tantalum. Mineral concentrates containing tantalum are usually referred to as 'tantalite' [1].
Tantalum (Ta) [Z = 73] - Springer
2022年4月12日 · The primary ore of tantalum is the columbite-tantalite group. The columbite group is a solid solution with varying proportions of Nb or Ta in its composition. According to the International Mineralogical Association (IMA), ‘tantalite’ or ‘coltan’ are not scientific names, yet they are widely used.
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