/flog"euh puyt'/, n.
a magnesium-rich mica mineral, usually yellowish-brown, but sometimes reddish-brown.
[1840-50; < Gk phlogop(ós) fiery-looking (phlog-, s. of phlóx flame + op(é) view, look + -os adj. suffix) + -ITE1]

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also called  brown mica 
 basic aluminosilicate of potassium, magnesium, and iron that is a member of the common mica group. Varieties that contain only small amounts of iron are economically important as electrical insulators. Phlogopite occurs typically as a metamorphic product (e.g., in crystalline metamorphosed limestones) and also in ultramafic igneous rocks. Phlogopite forms a chemical substitution series with biotite, from which it is arbitrarily distinguished by a magnesium-to-iron ratio greater than 2:1. For detailed physical properties, see mica (table).

      The name phlogopite also denotes an iron-free compound regarded as making up a large part of the mineral. Its chemical composition is K2Mg6(Si6Al2O20)(OH)4.

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Universalium. 2010.

Look at other dictionaries:

  • Phlogopite — Catégorie IX : silicates[1] Phlogopite Monte Somma (Vue 2,5 cm) …   Wikipédia en Français

  • Phlogopite — Phlogopite, Monte Somma, Italy General Category Mica, phyllosilicates …   Wikipedia

  • Phlogopite — Phlog o*pite, n. [Gr. ? firelike.] (Min.) A kind of mica having generally a peculiar bronze red or copperlike color and a pearly luster. It is a silicate of aluminia, with magnesia, potash, and some fluorine. It is characteristic of crystalline… …   The Collaborative International Dictionary of English

  • phlogopite — ● phlogopite nom féminin (grec phlogôpos, qui a l aspect de la flamme) Genre de mica magnésien voisin de la biotite …   Encyclopédie Universelle

  • phlogopite — [fläg′ō pīt΄] n. [Ger phlogopit < Gr phlogōpos, fiery (< phlox, flame: see PHLOX + ōps, face, EYE) + Ger it, ITE1] a brown, monoclinic mica, K(Mg,Fe) 3AlSiO10 (OH,F) 2, used mainly as an electrical insulator …   English World dictionary

  • phlogopite — Mica Mi ca, n. [L. mica crumb, grain, particle; cf. F. mica.] (Min.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in… …   The Collaborative International Dictionary of English

  • phlogopite — flogopitas statusas T sritis radioelektronika atitikmenys: angl. amber mica; phlogopite vok. Ambermica, f rus. флогопит, m pranc. mica ambré, m; phlogopite, m …   Radioelektronikos terminų žodynas

  • phlogopite — flogopitas statusas T sritis chemija apibrėžtis Mineralas. formulė KMg₃[(F,OH)₂|AlSi₃O₁₀] atitikmenys: angl. phlogopite rus. флогопит …   Chemijos terminų aiškinamasis žodynas

  • phlogopite — noun Etymology: German Phlogopit, from Greek phlogōpos fiery looking, from phlog , phlox + ōps face more at eye Date: 1850 a usually brown to red form of mica …   New Collegiate Dictionary

  • phlogopite — noun A mica mineral with the chemical formula KMgAlSiO(F,OH), a basic potassium magnesium aluminosilicate, used as an insulator. Syn: bronze mica …   Wiktionary

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