willemite

willemite
/wil"euh muyt'/, n.
a mineral, a zinc silicate, Zn2SiO4, sometimes containing manganese, occurring in prismatic crystals or granular masses, usually greenish, sometimes white, brown, or red: a minor ore of zinc.
[1835-45; named after King WILLEM I; see -ITE1]

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      white or greenish-yellow silicate mineral, zinc silicate, Zn2SiO4, that is found as crystals, grains, or fibres with other zinc ores in many deposits. Included are various localities in Sussex County, N.J., where it occurs in crystalline limestone and constitutes an important zinc ore; it was worked at Nutley for more than 100 years before the reserve was exhausted in 1954. Occurrences outside the United States include Belgium, Algeria, South West Africa/Namibia, and Greenland. Its brilliant green fluorescence led to its use in early television tubes. For detailed physical properties, see silicate mineral (table).

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Universalium. 2010.

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  • willémite — ● willémite nom féminin (du nom de Guillaume Ier [néerlandais Willem], roi de Hollande) Silicate naturel de zinc Zn2SiO4, rhomboédrique. (C est un minerai de zinc.) ⇒WILLEMITE, subst. fém. MINÉR. Silicate naturel de zinc, utilisé notamment pour… …   Encyclopédie Universelle

  • Willemite — Wil lem*ite, n. [From Willem I., king of the Netherlands.] (Min.) A silicate of zinc, usually occurring massive and of a greenish yellow color, also in reddish crystals (troostite) containing manganese. [1913 Webster] …   The Collaborative International Dictionary of English

  • willemite — [wil′ə mīt΄] n. [Du willemit, after Willem I (1772 1843), king of the Netherlands] a hard, rhombohedral mineral, Zn2SiO4, an ore of zinc; zinc silicate: cf. TROOSTITE …   English World dictionary

  • Willemite — 41°06′N 74°35′W / 41.1, 74.583 …   Wikipédia en Français

  • Willemite — Infobox mineral name = Willemite category = boxwidth = boxbgcolor = imagesize = caption = Willemite with franklinite from New Jersey formula = Zinc silicate (Zn2SiO4) molweight = color = Blue to Green habit = system = Rhombohedral twinning =… …   Wikipedia

  • willemite — vilemitas statusas T sritis chemija apibrėžtis Mineralas. formulė Zn₂SiO₄ atitikmenys: angl. willemite rus. виллемит …   Chemijos terminų aiškinamasis žodynas

  • willemite — noun Etymology: German Willemit, from Willem (William) I died 1843 king of the Netherlands Date: circa 1841 a mineral of varying color consisting of a silicate of zinc and occurring especially in massive or granular forms …   New Collegiate Dictionary

  • willemite — noun A rare mineral, zinc silicate, ZnSiO, that is a minor ore of zinc …   Wiktionary

  • willemite — wil·le·mì·te s.f. TS mineral. minerale molto raro di colore vario, costituito da silicato di zinco, che cristallizza nel sistema trigonale {{line}} {{/line}} DATA: 1875. ETIMO: der. del n.p.m. Willem, it. Guglielmo, nome del re di Olanda Willem I …   Dizionario italiano

  • willemite — wil·lem·ite …   English syllables

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