Néphéline

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• Nepheline — General Category Silicate mineral Chemical formula (Na,K)AlSiO4 …   Wikipedia

• néphéline — ● néphéline nom féminin Aluminosilicate de sodium du système hexagonal, appartenant au genre feldspathoïde. (La néphéline se forme dans les roches magmatiques sous saturées en silice [syénite néphélinique, phonolite].) ⇒NÉPHÉLINE, subst. fém.… …   Encyclopédie Universelle

• Nepheline — Néphéline Néphéline Catégorie IX : silicates Général …   Wikipédia en Français

• nepheline — [nef′əlīt΄nef′ə lēn΄, nef′əlin] n. [Fr néphéline < Gr nephelē, cloud (see NEBULA) + ine, INE1] a hard, light colored, hexagonal mineral, (Na,K)AlSiO4, used in making glass, china, etc.; sodium potassium aluminum silicate: sometimes called… …   English World dictionary

• Nepheline — Neph e*line (n[e^]f [ e]*l[i^]n), Nephelite Neph e*lite (n[e^]f [ e]*l[imac]t), n. [Gr. nefe lh cloud: cf. F. n[ e]ph[ e]line. Cf. {Nebula}.] (Min.) A mineral occuring at Vesuvius, in glassy hexagonal crystals; also elsewhere, in grayish or… …   The Collaborative International Dictionary of English

• nepheline — /nef euh lin/, n. a feldspathoid mineral, essentially sodium aluminum silicate, NaAlSiO4, occurring in alkali rich volcanic rocks. Also, nephelite /nef euh luyt /. [1805 15; < F néphéline, equiv. to néphél ( < Gk nephéle cloud) + ine INE2] * * *… …   Universalium

• nepheline — noun A feldspathoid mineral of silica poor igneous, plutonic and volcanic rocks. Chemically, Nepheline is a plagioclase feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, Nepheline weathers rapidly and …   Wiktionary

• nepheline — also nephelite noun Etymology: French néphéline, from Greek nephelē cloud more at nebula Date: circa 1814 a hexagonal mineral that is a usually glassy crystalline silicate of sodium, potassium, and aluminum common in igneous rocks • nephelinic… …   New Collegiate Dictionary

• nepheline — [ nɛf(ə)lɪn] noun a colourless, greenish, or brownish aluminosilicate mineral occurring in igneous rocks. Origin C19: from Fr. néphéline, from Gk nephelē cloud (because its fragments become cloudy on immersion in nitric acid) + ine2 …   English new terms dictionary

• nepheline — nefelinas statusas T sritis chemija apibrėžtis Mineralas. formulė KNa₃[AlSiO₄]₄ atitikmenys: angl. nepheline rus. нефелин …   Chemijos terminų aiškinamasis žodynas