/wool"freuh muyt', vawl"-/, 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.
Also, wolfram.
[1865-70; WOLFRAM + -ITE1]

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      chief ore of tungsten, commonly associated with tin ore in and around granite. Such occurrences include Cornwall, Eng.; northwestern Spain and northern Portugal; eastern Germany; Myanmar (Burma); the Malay Peninsula; and Australia.

      Wolframite consists of a mixture in varying proportions of the tungstates of iron and manganese, FeWO4 and MnWO4; varieties with dominant iron (Fe:Mn⋜4:1) are called ferberite, and those with dominant manganese (Mn:Fe⋜4:1) are called hübnerite. Wolframite's colour is brown to black, and it has a submetallic to metallic lustre and a perfect cleavage. The Mohs hardness is 5–5 1/2; specific gravity, 7–7.5; and crystal system, monoclinic.

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Universalium. 2010.

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  • wolframite — [wool′frə mīt΄] n. [Ger wolframit: see WOLFRAM] a semihard, heavy, dark colored, monoclinic mineral, (Fe,Mn)WO4, the chief ore of tungsten; iron manganese tungstate …   English World dictionary

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  • wolframite — wolfram [ vɔlfram ] n. m. • 1759; mot all. (XVIe), probablt de Wolf « loup » et Rahm « crème » ♦ Principal minerai de tungstène, tungstate naturel de fer et de manganèse, noirâtre. Mines de wolfram. On dit aussi WOLFRAMITE n. f. , 1892 .… …   Encyclopédie Universelle

  • wolframite — volframitas statusas T sritis chemija apibrėžtis Mineralas. formulė (Mn,Fe)[WO₄] atitikmenys: angl. wolframite rus. вольфрамит …   Chemijos terminų aiškinamasis žodynas

  • wolframite — volframitas statusas T sritis chemija formulė M₂WO₃ atitikmenys: angl. wolframite rus. вольфрамит ryšiai: sinonimas – trioksovolframatas (2–) …   Chemijos terminų aiškinamasis žodynas

  • wolframite — noun Etymology: German Wolframit, from Wolfram Date: circa 1868 a brown to black mineral that consists of a tungstate of iron and manganese occurring especially in monoclinic crystals and used as a source of tungsten …   New Collegiate Dictionary

  • wolframite — noun A mineral that consists of a tungstate of iron and manganese; (Fe,Mn)WO …   Wiktionary

  • wolframite — wol·fra·mì·te s.f. TS mineral. minerale di notevole interesse economico, di colore nero, costituito da wolframato di ferro e manganese, che cristallizza nel sistema monoclino ed è utilizzato per l estrazione di wolframio {{line}} {{/line}} DATA:… …   Dizionario italiano

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