oligoclase

oligoclase
/ol"i goh klays'/, n. Mineral.
a kind of plagioclase feldspar occurring commonly in white crystals, sometimes shaded with gray, green, or red.
[1825-35; OLIGO- + -CLASE]

* * *

      the most common variety of the feldspar mineral plagioclase (q.v.).

* * *


Universalium. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Oligoclase — Catégorie IX : silicates[1] Oligoclase Chihuahua, Mexico …   Wikipédia en Français

  • Oligoclase — from Chihuahua, Mexico General Category plagioclase, feldspar, tectosilicate …   Wikipedia

  • Oligoclase — Ol i*go*clase, n. [Oligo + Gr. ? fracture, fr. ? to break.] (Min.) A triclinic soda lime feldspar. See {Feldspar}. [1913 Webster] …   The Collaborative International Dictionary of English

  • oligoclase — ● oligoclase nom féminin Feldspath appartenant à la série des plagioclases, très répandu dans les roches cristallines …   Encyclopédie Universelle

  • oligoclase — [äl′i gōklās΄] n. [Ger oligoklas < Gr oligos (see OLIGO ) + klasis, a fracture (see CLASTIC), in contrast to ORTHOCLASE, because cleavage differs slightly from 90°] a plagioclase feldspar whose composition corresponds to 70 to 90 percent… …   English World dictionary

  • oligoclase — noun A plagioclase feldspar, the second member of the Albite Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula.… …   Wiktionary

  • oligoclase — oligoklazas statusas T sritis chemija apibrėžtis Mineralas. formulė (Na,Ca)[(Si,Al)AlSi₂O₈] atitikmenys: angl. oligoclase rus. олигоклаз …   Chemijos terminų aiškinamasis žodynas

  • oligoclase — noun Etymology: German Oligoklas, from olig olig + Greek klasis breaking, from klan to break more at clast Date: 1832 a mineral of the plagioclase series …   New Collegiate Dictionary

  • oligoclase — (entrée créée par le supplément) (o li go kla z ) s. f. Terme de minéralogie. Silicate double d alumine et de soude. C est une substance blanchâtre ou gris verdâtre, qui se présente en petites masses lamellaires …   Dictionnaire de la Langue Française d'Émile Littré

  • oligoclase — [ ɒlɪgə(ʊ)kleɪz] noun a feldspar mineral common in siliceous igneous rocks, consisting of a sodium rich plagioclase. Origin C19: from oligo + Gk klasis breaking (because thought to have a less perfect cleavage than albite) …   English new terms dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”