periclase

periclase
/per"i klays', -klayz'/, n.
a cubic mineral, native magnesia, MgO, occurring usually in metamorphosed dolomite.
[1835-45; < G Periklas < NL periclasia, equiv. to peri- PERI- + Gk klás(is) a breaking (cf. -CLASE) + -ia -IA]

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      magnesium oxide mineral (MgO) that occurs as colourless to grayish, glassy, rounded grains in marble and in some dolomitic limestones, where it formed by the metamorphosis of dolomite at high temperatures. Rocks containing periclase have been identified at Monte Somma and Predazzo, Italy; Nordmark and Långban, Swed.; and Crestmore, Calif. Periclase may be a major component of the mantle of the Earth. For detailed physical properties, see oxide mineral (table).

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Universalium. 2010.

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Look at other dictionaries:

  • Périclase — Catégorie IV : oxydes et hydroxydes[1] Général Classe de Strunz 04.AB.25 Formule brute Mg …   Wikipédia en Français

  • Periclase — General Category Oxide minerals Chemical formula MgO Strunz classification 04.AB.25 Crystal symmetry …   Wikipedia

  • périclase — 1. (pé ri kla z ) s. f. Terme de grammaire grecque. La modification du son représentée par l accent circonflexe, qui consistait en une élévation suivie d un abaissement de la voix. Y avait il en effet sur la même syllabe intensité de la voix d… …   Dictionnaire de la Langue Française d'Émile Littré

  • Periclase — Per i*clase, Periclasite Per i*cla site, n. [Pref. peri + Gr. ? to break.] (Min.) A grayish or dark green mineral, consisting essentially of magnesia (magnesium oxide), occurring in granular forms or in isometric crystals. [1913 Webster] …   The Collaborative International Dictionary of English

  • périclase — ● périclase nom féminin Oxyde naturel de magnésium, cubique, de formule MgO …   Encyclopédie Universelle

  • periclase — noun A cubic crystalline form of magnesium oxide (MgO) …   Wiktionary

  • periclase — Смотри Периклаз …   Энциклопедический словарь по металлургии

  • periclase — [ pɛrɪkleɪz, s] noun a colourless mineral consisting of magnesium oxide, occurring chiefly in marble and limestone. Origin C19: from mod. L. periclasia, erroneously from Gk peri utterly + klasis breaking (because it cleaves perfectly) …   English new terms dictionary

  • periclase — peri·clase …   English syllables

  • periclase — /ˈpɛrikleɪz/ (say pereeklayz), / eɪs/ (say ays) noun naturally occurring magnesium oxide. {German periklas} …  

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