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]

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or nephelite

Most common feldspathoid mineral, an aluminosilicate of sodium and potassium (Na3KAl4Si4O16).

It is sometimes used as a substitute for feldspars in the manufacture of glass and ceramics.

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also called  nephelite , or  eleolite 
 the most common feldspathoid mineral, an aluminosilicate of sodium and potassium [(Na,K)AlSiO4]. It is sometimes used as a substitute for feldspars in the manufacture of glass and ceramics. Nepheline is the characteristic mineral of alkaline plutonic rocks, particularly nepheline syenites and nepheline gneisses. It occurs in beautiful crystal form with mica, garnet, and sanidine feldspar on Monte Somma, Vesuvius, Italy. For detailed physical properties, see feldspathoid (table).

      Carnegieite is synthetic, high-temperature nepheline. kaliophilite is the high-temperature form of kalsilite, the potassium-rich variety of nepheline. Kaliophilite is unstable at normal temperatures and rarely occurs in nature.

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Universalium. 2010.

Look at other dictionaries:

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

  • Néphéline — Catégorie IX : silicates[1] Général …   Wikipédia en Français

  • 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 — 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

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