tungsten (mineral)

См. также в других словарях:

• Tungsten — (pronEng|ˈtʌŋstən), also known as wolfram (IPA|/ˈwʊlfrəm/), is a chemical element that has the symbol W and atomic number 74.A steel gray metal, tungsten is found in several ores, including wolframite and scheelite. It is remarkable for its… …   Wikipedia

• Mineral exploration — is the process of finding ore (commercially viable concentrations of minerals) to mine. Mineral exploration is a much more intensive, organized and professional form of mineral prospecting and, though it frequently uses the services of… …   Wikipedia

• tungsten processing — Introduction       preparation of the ore for use in various products.       Tungsten exhibits a body centred cubic (bcc) crystal lattice. It has the highest melting point of all metals, 3,410° C (6,170° F), and it has high conductivity for… …   Universalium

• mineral deposit — Introduction       aggregate of a mineral in an unusually high concentration.       About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… …   Universalium

• tungsten — tungstenic /tung sten ik/, adj. /tung steuhn/, n. Chem. a rare, metallic element having a bright gray color, a metallic luster, and a high melting point, 3410° C, and found in wolframite, tungstite, and other minerals: used in alloys of high… …   Universalium

• Tungsten(VI) oxide — Chembox new Name = Tungsten trioxide ImageFile = TungstenOxideSmall.jpg ImageName = Sample of Tungsten (VI) Oxide IUPACName = Tungsten trioxide OtherNames = Tungstic anhydride, tungsten (VI) oxide, tungstic oxide Section1 = Chembox Identifiers… …   Wikipedia

• mineral processing — or ore dressing Mechanical treatment of crude ores to separate the valuable minerals. Mineral processing was at first applied only to ores of precious metals but later came to be used to recover other metals and nonmetallic minerals. It is also… …   Universalium

• Mineral industry of Russia — Russia is one of the world’s leading mineral producing countries and accounts for a large percentage of the CIS’s production of a range of mineral products, including metals, industrial minerals, and mineral fuels. In 2005, Russia ranked among… …   Wikipedia

• Mineral industry of Kazakhstan — Kazakhstan ranks second only to Russia among the countries of the CIS in its quantity of mineral production. It is endowed with large reserves of a wide range of metallic ores, industrial minerals, and fuels, and its metallurgical sector is a… …   Wikipedia

• Tungsten(IV) sulfide — Chembox new Name = Tungsten(IV) sulfide ImageFile = Tunsgten(IV) sulfide.jpg ImageName = Tungsten(IV) sulfide OtherNames = tungsten disulfide tungstite Section1 = Chembox Identifiers CASNo = 12138 09 9 Section2 = Chembox Properties Formula = S2W… …   Wikipedia

• Mineral Resources —    The production and export of nonhydrocarbon minerals has been important to the Burmese economy since precolonial times, though production after the British colonial era declined because of insurgency in mining areas, nationalization, and… …   Historical Dictionary of Burma (Myanmar)