common feldspar

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English-Russian dictionary of geology. 2011.

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  • Feldspar — Feld spar , Feldspath Feld spath , n. [G. feldspath; feld field + spath spar.] (Min.) A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta.… …   The Collaborative International Dictionary of English

  • Feldspar — is the name of a group of rock forming minerals which make up as much as 60% of the Earth s crust.Feldspar. [http://www.ima na.org/about industrial minerals/feldspar.asp What is Feldspar?] Industrial Minerals Association. Retrieved on July 18… …   Wikipedia

  • feldspar — /feld spahr , fel /, n. any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks. Also, felspar.… …   Universalium

  • Common types of volcanic rock — ▪ Table Common types of volcanic rock name silica content (percent) major minerals colour approximate density with no voids (grams per cubic cm) basalt 45 53 Ca feldspar, pyroxene, olivine dark gray 3.0 andesite 53 62 CaNa feldspar, pyroxene,… …   Universalium

  • Common metamorphic minerals as a function of pressure, temperature, and protolith composition — ▪ Table Common metamorphic minerals as a function of pressure, temperature, and protolith composition* protolith high P/low T medium P and T low P/high T shale, mudstone (pelitic) paragonite, muscovite muscovite, paragonite muscovite kyanite… …   Universalium

  • glassy feldspar — Sanidine San i*dine, n. [Gr. ?. ?, a board. So called in allusion to the tabular crystals.] (Min.) A variety of orthoclase feldspar common in certain eruptive rocks, as trachyte; called also {glassy feldspar}. [1913 Webster] …   The Collaborative International Dictionary of English

  • alkali feldspar — Any of several common silicate minerals that often occur as whitish to variously coloured, glassy crystals. The alkali feldspars may be regarded as mixtures of sodium aluminosilicate (NaAlSi3O8) and potassium aluminosilicate (KAlSi3O8). Both the… …   Universalium

  • Labrador feldspar — Labrador Lab ra*dor , n. A region of British America on the Atlantic coast, north of Newfoundland. [1913 Webster] {Labrador duck} (Zo[ o]l.), a sea duck ({Camtolaimus Labradorius}) allied to the eider ducks. It was formerly common on the coast of …   The Collaborative International Dictionary of English

  • Feldspath — Feldspar Feld spar , Feldspath Feld spath , n. [G. feldspath; feld field + spath spar.] (Min.) A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case …   The Collaborative International Dictionary of English

  • albite — albitic /al bit ik/, adj. /al buyt/, n. Mineral. the sodium end member of the plagioclase feldspar group, light colored and found in alkalic igneous rocks. [1835 45; < L alb(us) white + ITE1] * * * Common feldspar mineral, a sodium… …   Universalium

  • microcline — /muy kreuh kluyn /, n. a mineral of the feldspar group, potassium aluminum silicate, KAlSi3O8, identical in composition with orthoclase but having triclinic instead of monoclinic crystals, used in making porcelain. [1840 50; MICRO + cline < Gk… …   Universalium

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