augite

augite
—augitic /aw jit"ik/, adj.
/aw"juyt/, n.
a silicate mineral, chiefly of calcium, magnesium, iron, and aluminum: a dark-green to black variety of monoclinic pyroxene, characteristic of basic rocks.
[1780-90; < L augitis a kind of precious stone < Gk, equiv. to aug(é) sunlight + -itis, fem. of -ites -ITE1]

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Most common pyroxene mineral, occurring chiefly as blocky crystals in basalts, gabbros, andesites, and various other dark igneous rocks.

It also is a common constituent of lunar basalts and meteorites and may be found in certain metamorphic rocks, such as pyroxenites. Because the diopside-hedenbergite series and augite are nearly indistinguishable, the term augite is sometimes used to designate any dark green to black pyroxene with monoclinic symmetry (three unequal crystallographic axes with one oblique intersection).

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 the most common pyroxene mineral (a silicate of calcium, magnesium, iron, titanium, and aluminum). It occurs chiefly as thick, tabular crystals in basalts, gabbros, andesites, and various other dark-coloured igneous rocks. It also is a common constituent of lunar basalts and meteorites rich in basaltic material. Augites may be found in certain metamorphic rocks, notably marbles. For chemical formula and detailed physical properties, see pyroxene (table).

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Look at other dictionaries:

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  • Augite — Au gite ([add] j[imac]t), n. [L. augites, Gr. a ygi ths, fr. a ygh brightness: cf. F. augite.] A variety of pyroxene, usually of a black or dark green color, occurring in igneous rocks, such as basalt; also used instead of the general term… …   The Collaborative International Dictionary of English

  • augite — [ô′jīt΄] n. [L augites < Gr augitēs, a precious stone < augē, sunlight, brightness < IE base * aug , to gleam] any of various dark colored, hard, monoclinic pyroxenes, (Ca, Na) (Mg, Fe, Al) (Si, Al) 2O6, found in basic igneous rocks …   English World dictionary

  • Augite — Infobox mineral name = Augite category = Silicate mineral boxwidth = boxbgcolor = imagesize = caption = formula = (Ca,Mg,Fe)SiO3 molweight = color = Pale brown to purplish or greenish brown, also dark grey sometimes habit = system = Monoclinic… …   Wikipedia

  • augite — augitas statusas T sritis chemija apibrėžtis Mineralas. formulė Ca(Mg,Fe,Ti,Al)[(Si,Al)₂O₆] atitikmenys: angl. augite rus. авгит …   Chemijos terminų aiškinamasis žodynas

  • Augite aegyrinique — ● Augite aegyrinique pyroxène de composition intermédiaire entre l augite et l aegyrine …   Encyclopédie Universelle

  • augite — noun Etymology: Latin augites, a precious stone, from Greek augitēs Date: 1804 1. a usually black or dark green mineral that consists of aluminous pyroxene and is found especially in igneous rocks 2. pyroxene • augitic …   New Collegiate Dictionary

  • augite — noun A variety of pyroxene, usually of a black or dark green color, occurring in igneous rocks, such as basalt …   Wiktionary

  • augite — au·gì·te s.f. TS mineral. minerale di colore scuro o nero, costituito da silicato di calcio, magnesio, ferro e alluminio del gruppo dei pirosseni {{line}} {{/line}} DATA: 1817. ETIMO: der. del gr. augē raggio con 2 ite …   Dizionario italiano

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