How To Use Wolframite In A Sentence
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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This and nearby districts are also known for perfect, doubly terminated wolframite crystals to 20 cm, perched on water-clear quartz.
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Minerals such as wolframite, arsenopyrite, fluorite, and quartz are well known from this mine.
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The hunter walked slowly in the forest, followed by his wolframite.
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Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
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In the Democratic Republic of Congo, armed groups force villagers to mine minerals like wolframite and cassiterite.
Stanford Students Take Stand Against 'Conflict Minerals'
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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.
Global Voices in English » New bill to increase oversight of American mining companies in DRC
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Tungsten is retrieved from the ore minerals scheelite (CaWO4, calcium tungstate) and wolframite ((Fe, Mn) WO4, iron-manganese tungstate).
Tungsten
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Feldspar has been hydrothermally altered by a fluorine-rich water vapor to quartz, mica (usually lithian), topaz and/or tourmaline with fluorite, cassiterite, molybdenite, rutile, and wolframite as typical accessory minerals.
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This is especially important for those valuable minerals which exhibit a brittle to very brittle tenacity, such as cassiterite, sphalerite and the tungsten minerals scheelite and wolframite.
Chapter 20
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Minerals such as wolframite, arsenopyrite, fluorite, and quartz are well known from this mine.
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Griffitts reported that wolframite is a commonly occurring mineral in some beryl-bearing veins, especially at the Mary Lee prospect.
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Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
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It occurs most commonly in the minerals scheelite (calcium tungstate) and wolframite (iron manganese tungstate WO 4).
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It is found in more than 800 different minerals, the most important of which are thortveitite and wolframite.
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How about apatite, apophyllite, axinite, chlorite, hypersthene, scapolite, serpentine, tantalite, and wolframite?
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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.
Human Rights First: Controlling enablers in the conflict mineral trade
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At least ten tungsten minerals are reported, but ‘wolframite’ and scheelite are the only two with significant economic distribution and concentration.
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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.
Can Annual Reports Save Lives?
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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.
Tungsten
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The flotation experimental results showed that methyl benzyl arsonic acid is an effective collector for wolframite and cassiterite slime.
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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.
Human Rights First: Controlling enablers in the conflict mineral trade
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Other mineral resources include wolframite, gold and unexploited natural gas reserves.
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
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Hillebrand reports on hubnerite and wolframite on the 1700 level of the north Montana vein.
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Wolframite crystals 5-15 cm long were scattered throughout the vein along with numerous cavities or ‘pockets’ with crystals of quartz and wolframite.
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The development of main mineral processing technologies of wolframite and scheelite are presented in the paper.
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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.
Human Rights First: Controlling enablers in the conflict mineral trade
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Lustrous pyrrhotite crystals on quartz and wolframite were recovered at one time from the ‘Cables’ section of the Chicote Grande mine, Bolivia.
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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There are two kinds of tungsten deposits: wolframite in quartz veins and in scheelite skarn.
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How about apatite, apophyllite, axinite, chlorite, hypersthene, scapolite, serpentine, tantalite, and wolframite?
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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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.
Can Annual Reports Save Lives?
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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.
Rep. Howard L. Berman: Why We Should Care About the Congo
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This is especially important for those valuable minerals which exhibit a brittle to very brittle tenacity, such as cassiterite, sphalerite and the tungsten minerals scheelite and wolframite.
Chapter 20
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How about apatite, apophyllite, axinite, chlorite, hypersthene, scapolite, serpentine, tantalite, and wolframite?
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Other mineral resources include wolframite, gold and unexploited natural gas reserves.
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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.
Global Voices in English » New bill to increase oversight of American mining companies in DRC
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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.
Mvemba Dizolele: Conflict Minerals in the Congo: Let's Be Frank About Dodd-Frank
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For processing fine, feebly magnetic minerals, such as hematite, limonite, ilmenite, wolframite, tantalumniobium, red sludge and etc.
