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beryllium silicate

См. также в других словарях:

  • beryllium — /beuh ril ee euhm/, n. Chem. a steel gray, bivalent, hard, light, metallic element, the salts of which are sweet: used chiefly in copper alloys for better fatigue endurance, in springs, and in electrical contacts. Symbol: Be; at. wt.: 9.0122; at …   Universalium

  • phenakite — [fen′əsīt΄fen′ə kīt΄] n. 〚Swed phenakit < Gr phenax (gen. phenakos), cheat + ITE1: from being mistaken for quartz〛 a very hard, glassy, rhombohedral mineral, Be2SiO4, of various colors, sometimes used as a gem; beryllium silicate: often …   Universalium

  • Danalite — General Category Sodalite Feldspathoid Chemical formula Fe2+4Be3(SiO …   Wikipedia

  • luminescence — luminescent, adj. /looh meuh nes euhns/, n. 1. the emission of light not caused by incandescence and occurring at a temperature below that of incandescent bodies. 2. the light produced by such an emission. [1885 90; < L lumin (see LUMEN) +… …   Universalium

  • bertrandite — /berr treuhn duyt /, n. a mineral, hydrous beryllium silicate, Be4Si2O7(OH)2, colorless or pale yellow, with a vitreous luster, occurring as tabular or prismatic crystals in pegmatites and hydrothermal veins. [1885 90; < F, after E. Bertrand,… …   Universalium

  • phenacite — /fen euh suyt /, n. a rare vitreous mineral, beryllium silicate, Be2SiO4, occurring in crystals, sometimes used as a gem. Also, phenakite /fen euh kuyt /. [1825 35; < Gk phenak (s. of phénax) a cheat, quack + ITE1] * * * …   Universalium

  • chkalovite — noun A rare mineral, sodium beryllium silicate …   Wiktionary

  • phenacite — /ˈfɛnəsaɪt/ (say fenuhsuyt) noun a vitreous mineral, beryllium silicate, Be2SiO4, occurring in crystals, sometimes used as a gem. Also, phenakite /ˈfɛnəkaɪt/ (say fenuhkuyt). {Greek phenax cheat, impostor + ite1} …  

  • phenakite — [fen′əsīt΄fen′ə kīt΄] n. [Swed phenakit < Gr phenax (gen. phenakos), cheat + ITE1: from being mistaken for quartz] a very hard, glassy, rhombohedral mineral, Be2SiO4, of various colors, sometimes used as a gem; beryllium silicate: often… …   English World dictionary

  • bertrandite — ˈbər.trənˌdīt noun ( s) Etymology: French, from E. Bertrand, 19th century Frenchman who first described it + French ite : a mineral Be4Si2O7(OH)2 consisting of a beryllium silicate occurring in hard colorless or pale yellow prismatic crystals… …   Useful english dictionary

  • eudidymite — yüˈdidəˌmīt noun ( s) Etymology: Norwegian eudidymit, from eu + Greek didymos twin + Norwegian it ite; from its occurrence in twin crystals more at didym : a mineral NaBeSi3O7( …   Useful english dictionary

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