wolframite
IPA: wˈʊɫfræmaɪt
noun
- (mineralogy) A mineral that consists of a tungstate of iron and manganese; (Fe,Mn)WO₄.
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Examples of "wolframite" in Sentences
- Its important ores include wolframite and scheelite.
- In 1860 a rich body of ore containing wolframite was discovered.
- In the Democratic Republic of Congo, armed groups force villagers to mine minerals like wolframite and cassiterite.
- The minerals in question—cassiterite, columbite-tantalite, gold and wolframite—are widely used in consumer electronics and other products, although Congo supplies no more than 20% of global demand for these raw materials.
- Tungsten was discovered in 1758 by Axel Fredrik Cronstadt; in 1781 Carl Wilhelm Scheele isoldated a tungsten oxide, and in 1783 the Spanish chemists (and brothers) Fausto and Juan Jose de Elhuyar first separated tungsten from the mineral wolframite.
- The pending bills in the Senate and House would force companies to determine and disclose whether coltan, tin, gold, and wolframite used in their products originated in war-torn areas of the Congo, information that the U.S. government would then make public.
- Despite 10 years of United Nations reporting about vicious violence connected with gold, tin, coltan and wolframite, many international refining and trading companies insist, implicitly or explicitly, that their due diligence need not extend to the origins of these minerals.
- Like the activists who lobbied for the legislation, Dodd-Frank assumes that minerals such as gold, wolframite, coltan and tin, which are extracted from areas under the control of armed groups, drive the conflict, and therefore, curbing the trade would bring peace to the region.
- Furthermore, in September 2009 it formed a regional steering committee charged with implementing plans that will allow member states to act in concert against illegal exploitation of natural resources and to establish a regional certification system for gold, tin, coltan, and wolframite.
- Building on the work of a coalition of a dozen major humanitarian organizations and industry pioneers, the bill establishes a new mechanism that will limit the ability of armed groups to profit from the illicit mining and sale of cassiterite, coltan, and wolframite and other "conflict minerals."
- On April 23rd, Republican senator Sam Brownback introduced the Congo Conflict Minerals Act of 2009, cosponsored by senators Russ Feingold and Dick Durbin, which would require American companies mining coltan, cassiterite, and wolframite to report annually to the Security and Exchange Commission (SEC), the agency that regulates American financial markets, to disclose the country of origin of the minerals to the Securities and Exchange Commission.
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