diopside


diopside
/duy op"suyd, -sid/, n. Mineral.
a monoclinic pyroxene mineral, calcium magnesium silicate, CaMg(SiO3)2, occurring in various colors, usually in crystals.
[1800-10; DI-3 + Gk óps(is) appearance + -IDE]

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Common silicate mineral in the pyroxene family.

Diopside is a calcium and magnesium silicate (CaMgSi2O6) that occurs in metamorphosed siliceous limestones and dolomites, in skarns, and in igneous rocks. It is also found in small amounts in many chondritic meteorites. Clear specimens of good green colour are sometimes cut as gems.

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      common silicate mineral in the pyroxene family that occurs in metamorphosed siliceous limestones and dolomites and in skarns (skarn) (contact-metamorphic rocks rich in iron); it is also found in small amounts in many chondrite meteorites. Clear specimens of good green colour are sometimes cut as gems.

      Diopside is a calcium and magnesium silicate (CaMgSi2O6). It forms a complete chemical replacement series with hedenbergite in which ferrous iron completely replaces magnesium in the molecular structure. Hedenbergite is common in limestone skarns, in thermally metamorphosed iron-rich sediments, and in some igneous rocks; sodium-rich varieties are found in many alkaline rocks. See also augite. For detailed physical properties, see pyroxene (table).

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Universalium. 2010.

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  • diopside — ● diopside nom masculin (grec diopsis, action de voir à travers) Minéral du groupe des pyroxènes, de composition CaMgSi6O6, monoclinique, que l on trouve dans les roches magmatiques basiques et dans certaines roches métamorphiques (pyroxénites,… …   Encyclopédie Universelle

  • Diopside — Di*op side, n. [Gr. di = di s twice + ? a sight, fr. the root of ? I shall see: cf. F. diopside.] (Min.) A crystallized variety of pyroxene, of a clear, grayish green color; mussite. [1913 Webster] …   The Collaborative International Dictionary of English

  • diopside — [dī äp′sīd΄, dī äp′sid] n. [Fr < di (see DI 2) + Gr opsis, appearance, sight (< ōps, EYE); assoc. in meaning with Gr diopsis, transparency < dia , through + opsis, sight] a light colored, hard, crystalline pyroxene, CaMg(Si2O6), calcium… …   English World dictionary

  • diopside — di·ò·psi·de s.m. TS mineral. minerale dei pirosseni, costituito da silicato di calcio e magnesio, che si presenta in cristalli prismatici bianchi, incolori o verdi, contenuto in alcune rocce metamorfiche {{line}} {{/line}} DATA: 1817. ETIMO: der …   Dizionario italiano

  • diopside — diopsidas statusas T sritis chemija apibrėžtis Mineralas. formulė CaMg[Si₂O₆] atitikmenys: angl. diopside rus. диопсид …   Chemijos terminų aiškinamasis žodynas

  • diopside — noun Etymology: French, from di + Greek opsis appearance more at optic Date: circa 1808 a green to white mineral that consists of pyroxene containing little or no aluminum • diopsidic adjective …   New Collegiate Dictionary

  • diopside — noun A monoclinic pyroxene mineral, a magnesium calcium silicate with the chemical formula CaMgSiO, found in igneous and metamorphic rocks …   Wiktionary

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