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columbite

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  • Mine Games A Coltan is the industrial name for columbite--tantalite, a dull black metallic ore from which the elements niobium (formerly "columbium") and tantalum are extracted. The niobium-dominant mineral is columbite, hence the "col" half of the term. The mineral concentrates dominated by tantalum are referred to as tantalite. Tantalum from coltan is used to manufacture electronic capacitors, used in consumer electronics products such as cell phones, DVD players, video game systems and computers. Export of coltan from the eastern Democratic Republic of the Congo to European and American markets has been cited by experts as helping to finance the present-day conflict in the Congo, with the DanChurchAid agency asserting that "much of the finance sustaining the civil wars in Africa, especially in the Democratic Republic of the Congo, is directly connected to coltan profits." An estimated 6.9 million people have died since 1998 in the war in the Congo.
  • Columbite-tantalite is Bad Social justice project about the mineral Coltan mined by slaves in the Congo. Don't get a cell phone!
  • Taxation is not child slavery. Re: The ends sometimes justify the means. Coltan is a mineral that conducts electricity in advantageous ways. Columbite and tantalite are the two elements within it. I may have accidentally said "tanzanite" in this video, which is a blue ore that also finds its source in very poor working conditions. Mentioned here: ForaTV's abolitionist talk:
  • Mine Games B Coltan is the industrial name for columbite--tantalite, a dull black metallic ore from which the elements niobium (formerly "columbium") and tantalum are extracted. The niobium-dominant mineral is columbite, hence the "col" half of the term. The mineral concentrates dominated by tantalum are referred to as tantalite. Tantalum from coltan is used to manufacture electronic capacitors, used in consumer electronics products such as cell phones, DVD players, video game systems and computers. Export of coltan from the eastern Democratic Republic of the Congo to European and American markets has been cited by experts as helping to finance the present-day conflict in the Congo, with the DanChurchAid agency asserting that "much of the finance sustaining the civil wars in Africa, especially in the Democratic Republic of the Congo, is directly connected to coltan profits." An estimated 6.9 million people have died since 1998 in the war in the Congo.
  • Conflict Minerals UK Services provided by Conflict Minerals UK, helping to identify and audit supply chain for Tungsten, Tin, Tantalum and Gold. Identifying conflict materials and helping make DR Congo a safer place.
  • Columbite, Brazil 2.0" SharpShinyBlack COLUMBITE Crystal-Minas Gerais-Brazil...please visit us at to see over 2500 more fine mineral specimens
  • Niobium Name Origin From Niobe; daughter of the mythical Greek king Tantalus. "Niobium" in different languages. Sources Occurs in the minerals columbite ([(Fe, Mn)(Nb, Ta)2O6]), columbite-tantalite, pyrochlore ((Na,Ca)2Nb2O6(OH,F)) and euxenite ((Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6). Brazil and Canada are the major producers of niobium mineral concentrates and extensive ore reserves are also in Nigeria, Democratic Republic of Congo, and in Russia. Around 15 thousand tons are produced annually. Uses It is used in stainless steel alloys for nuclear reactors, jets, missiles, cutting tools, pipelines, super magnets and welding rods. Because of its bluish colour, niobium is also used in body piercing jewellery (usually as an alloy). Appreciable amounts of niobium in the form of high-purity ferroniobium and nickel niobium are used in nickel-, cobalt-, and iron-base superalloys for such applications as jet engine components, rocket subassemblies, and heat-resisting and combustion equipment. For example, advanced air frame systems such as those used in the Gemini program used this metal. Niobium is also added to glass in order to attain a higher refractive index, a property used in the optical industry to make thinner corrective glasses.
  • Types Of Ores Check us out at An ore is a type of rock that contains minerals with important elements including metals. The ores are extracted through mining; these are then refined to extract the valuable element(s). The grade or concentration of an ore mineral, or metal, as well as its form of occurrence, will directly affect the costs associated with mining the ore. The cost of extraction must thus be weighted against the contained metal value of the rock to determine what ore can be profitably extracted and what ore is of too low a grade to be worth mining. Metal ores are generally oxides, sulfides, silicates, or "native" metals (such as native copper) that are not commonly concentrated in the Earth's crust or "noble" metals (not usually forming compounds) such as gold. The ores must be processed to extract the metals of interest from the waste rock and from the ore minerals. Ore bodies are formed by a variety of geological processes. The process of ore formation is called ore genesis. Important ore minerals •Acanthite: Ag2S for production of silver •Barite: BaSO4 •Bauxite Al2O3 for production of aluminium •Beryl: Be3Al2(SiO3)6 •Bornite: Cu5FeS4 •Cassiterite: SnO2 •Chalcocite: Cu2S for production of copper •Chalcopyrite: CuFeS2 •Chromite: (Fe, Mg)Cr2O4 for production of chromium •Cinnabar: HgS for production of mercury •Cobaltite: (Co, Fe)AsS •Columbite-Tantalite or Coltan: (Fe, Mn)(Nb, Ta)2O6 •Galena: PbS •Gold: Au, typically associated with quartz or as placer ...