wolframite

wolf·ram·ite

W0202000 (wo͝ol′frə-mīt′)n. Any of several red-brown to black minerals with the general formula (Fe,Mn)WO₄, which constitute a major source of tungsten.

wolframite

(ˈwʊlfrəˌmaɪt) n (Minerals) a black to reddish-brown mineral consisting of tungstates of iron and manganese in monoclinic crystalline form: it occurs mainly in quartz veins and is the chief ore of tungsten. Formula: (Fe,Mn)WO4

wolf•ram•ite

(ˈwʊl frəˌmaɪt, ˈvɔl-)

n. a mineral, iron manganese tungstate, (Fe,Mn)WO₄, occurring in heavy grayish black to brownish black tabular or bladed crystals: an important ore of tungsten. [1865–70]

Thesaurus

Noun

wolframite - a mineral consisting of iron and manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocksiron manganese tungstenatomic number 74, tungsten, W, wolfram - a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelitemineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition

wolframite

(wo͝ol`frəmīt'), reddish-brown to grayish-black lustrous mineral, a tungstate of iron and manganese, (Fe,Mn)Wo₄, occurring in crystals of the monoclinic system. It is the chief ore of the metal tungsten. Widely distributed in nature, it is mined in England, Portugal, Bolivia, Myanmar and the Malay Peninsula, S China, Australia, and W United States.

Wolframite

a mineral, formula (Fe, Mn) [WO₄]; belongs to the isomorphous series whose terminal members are huebnerite, Mn[WO₄], and ferberite, Fe[WO₄]. It contains 74-76 percent WO3. Characteristic admixtures are MgO, Ta₂O₅, Nb₂O₅, ThO₂, and Sc₂O₃. The content of niobium and tantalum is associated with an isomorphous impurity, but more often with very fine inclusions of minerals of the columbite group. It crystallizes in a monoclinic system. Laminar, thick-tabular, prismatic crystals, minute laminar grains, and coarse-grained aggregates are common. Wolframite is brownish black, huebnerite is reddish, and ferberite is black. The luster is bright to diamondlike. Hardness on the mineralogical scale, 5-5.5; density, 6,700 kg/m3 for huebnerite, and 7,500 kg/m³ for ferberite. Wolframite is found in greisens and quartz veins associated with muscovite, topaz, fluorite, beryl, bismuthine, cassiterite, molybdenite, arsenopyrite and, rarely, antimonite. It is sometimes replaced by scheelite. In an oxidation zone, wolframite is partly replaced by tungsten ochers (tungstite) and ferritungstite.

Wolframite is the main ore mineral from which tungsten is obtained. When it contains large amounts of Sc and Ta, they can be extracted as by-products.

REFERENCE

Barabanov, V. F. Mineralogiia vol’framitovykh mestorozhdenii Vostochnogo Zabaikal’ia [vol. 1]. Leningrad, 1961.

wolframite

[′wu̇l·frə‚mīt] (mineralogy) (Fe,Mn)WO₄ A brownish- or grayish-black mineral occurring in short monoclinic, prismatic, bladed crystals; the most important ore of tungsten. Also known as tobacco jack; wolfram; wolframine.

wolframite

wolf·ram·ite

wolframite

wolf•ram•ite

wolframite

wolframite

Wolframite

REFERENCE

wolframite

wolframite

Synonyms for wolframite

noun a mineral consisting of iron and manganese tungstate in crystalline form

Synonyms

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