orthoclase feldspar

См. также в других словарях:

• Orthoclase — General Category Silicate mineral Chemical formula KAlSi3O8 …   Wikipedia

• 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

• Orthoclase — Or tho*clase, n. [Ortho + Gr. ? to break.] (Min.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See {Feldspar}. [1913 Webster] …   The Collaborative International Dictionary of English

• orthoclase — [ôr′thō klās΄, ôr′thōklāz΄; ôr′thəklās΄, ôr′thəklāz΄] n. [Ger orthoklas < Gr orthos (see ORTHO ) + klasis, fracture (< klan, to break: see CLASTIC), because of the 90° cleavage] a monoclinic feldspar, KAlSi3O8, that is dimorphic with… …   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

• orthoclase — /awr theuh klays , klayz /, n. a common white or pink mineral of the feldspar group, KAlSi3O8, having two good cleavages at right angles, and found in silica rich igneous rocks: used in the manufacture of porcelain. [1840 50; ORTHO + clase < Gk… …   Universalium

• orthoclase — noun Potassium aluminum silicate, KAlSiO, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh colored. Orthoclase is used in the ceramic and …   Wiktionary

• orthoclase — noun Etymology: German Orthoklas, from orth + Greek klasis breaking, from klan to break more at clast Date: 1849 a monoclinic mineral of the feldspar group consisting of a silicate of potassium and aluminum …   New Collegiate Dictionary

• orthoclase — [ ɔ:θəkleɪz] noun a potassium rich mineral of the feldspar group, typically white or pink. Origin C19: from ortho + Gk klasis breaking (because of the characteristic two cleavages at right angles) …   English new terms dictionary

• orthoclase — or•tho•clase [[t]ˈɔr θəˌkleɪs, ˌkleɪz[/t]] n. mir a common white or pink potassium feldspar mineral, KAlSi3O8, having two good cleavages at right angles, and found in silica rich igneous rocks • Etymology: 1840–50 …   From formal English to slang