Also found in: Thesaurus, Wikipedia.
Related to columbite-tantalite: Tantalum Ore


A dull black aggregate of the minerals columbite and tantalite, mined as a source of niobium and tantalum. Also called coltan.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.columbite-tantalite - a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
References in periodicals archive ?
If they are looking for columbite-tantalite (coltan) or other rare earths, they are generally found in these soils, which means you have to remove them in order to extract these minerals.
Hashmi reported that there were two main mining areas for tourmaline near Numbi; at both localities, columbite-tantalite minerals are recovered as a by-product.
The following conflict minerals are defined in the SEC's final rule: columbite-tantalite (coltan), cassiterite, gold, wolframite, and their derivatives (currently limited to tantalum, tin, and tungsten, which are extracted from coltan, cassiterite, and wolframite, respectively), "or any other minerals or their derivatives determined by the Secretary of State to be financing conflict in the Covered Countries" (SEC Final Rule 34-67716, p.
The primary exploration focus of the Project is Neo-Proterozoic pegmatites mineralized with cassiterite and columbite-tantalite (coltan); in addition to conventional geological, geochemical and geophysical exploration techniques that will be utilized the recently completed inventory of artisanal minesites will provide invaluable evidence of where the mineralized pegmatites outcrop and offer a weathered exposure amenable to primitive artisanal extraction.
Conflict minerals include cassiterite (tin), columbite-tantalite (tantalum), wolframite (tungsten), and gold (the "3 T's and G") that originated from the Democratic Republic of the Congo or adjoining countries.
More accurately termed columbite-tantalite, but universally known by its abbreviation 'coltan', author Michael Nest explodes many of the myths that have grown around this controversial metal.
The main minerals at issue are columbite-tantalite (coltan, a
According to the United States Geological Survey, Africa holds 90 percent of the world's deposits of cobalt, 90 percent of its platinum, 50 percent of its gold, 98 percent of its chromium, 64 percent of its manganese, 33 percent of its uranium, and 80 percent of its columbite-tantalite.
The report also says that Apple is working with the Global e-Sustainability Initiative (GESI) and the Electronic Industry Citizenship Coalition (EICC) to ensure that their suppliers are using conflict-free sources of extractives, namely "The mining of columbite-tantalite, cassiterite, wolframite, and gold which are refined into tantalum (Ta), tin (Sn), tungsten (W), and gold (Au), respectively [that] is believed to fuel political strife in the Democratic Republic of Congo and neighboring regions.
E-readers require the mining of nonrenewable minerals, such as columbite-tantalite and lithium.
This was followed by accusations of gross human rights violation by Tutsi's dominated Rwandan Patriotic Front (RPF) and its allies in Eastern Democratic Republic of Congo (DCR) against native Congolese and dissident Hutus, and the pillage of DCR's resources in form of illegal mining of diamonds and Coltan (short for columbite-tantalite, a metallic ore used in manufacture of components of mobile phones and consumer electronics products).
The law essentially bans the import of gold, columbite-tantalite, cassiterite, wolframite, and their derivatives from the DRC by US-based publicly held companies, enacts strict reporting standards, and implements a new labeling procedure.