triclinic feldspar

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• 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 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 — [feld′spär΄] n. [altered < Ger feldspath (now feldspat) < feld, FIELD + spath, spar < IE base * spe , long, flat board > SPOON, SPADE1] any of several light colored, hard, glassy, monoclinic or triclinic minerals made up of aluminum… …   English World dictionary

• 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

• Anorthosite — A*nor tho*site, n. [F. anorthose triclinic feldspar (fr. Gr. ? priv. + ? straight) + ite.] (Petrol.) A granular igneous rock composed almost exclusively of a soda lime feldspar, usually labradorite. [Webster 1913 Suppl.] || …   The Collaborative International Dictionary of English

• Plagioclase — Pla gi*o*clase, n. [Gr. pla gios oblique + kla^n to break.] (Min.) A general term used of any triclinic feldspar. See the Note under {Feldspar}. [1913 Webster] …   The Collaborative International Dictionary of English

• Andesine — An des*ine, n. (Min.) A kind of triclinic feldspar found in the Andes. [1913 Webster] …   The Collaborative International Dictionary of English

• Andesite — An des*ite, n. (Min.) An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene. [1913 Webster] …   The Collaborative International Dictionary of English

• Basalt — Ba*salt , n. [L. basaltes (an African word), a dark and hard species of marble found in Ethiopia: cf. F. basalte.] 1. (Geol.) A rock of igneous origin, consisting of augite and triclinic feldspar, with grains of magnetic or titanic iron, and also …   The Collaborative International Dictionary of English

• Diabase — Di a*base, n. [F. diabase, fr. Gr. ? a crossing or passing over, fr. ?; ? + ? to go; so called by Brongniart, because it passes over to diorite.] (Min.) A basic, dark colored, holocrystalline, igneous rock, consisting essentially of a triclinic… …   The Collaborative International Dictionary of English

• Diorite — Di o*rite, n. [Cf. F. diorite. See {Diorism}.] (Min.) An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called greenstone. [1913 Webster] …   The Collaborative International Dictionary of English