- pyrophyllite
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pyrophyllite
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PYROPHYLLITE — Très semblable au talc, la pyrophyllite est un phyllosilicate d’alumine, de formule chimique: Al2(Si410)(OH)2, ou Al23, 4 Si2, H2O. Elle possède une certaine aptitude à se débiter en feuillets, d’où l’origine de son nom (de deux mots grecs: pyros … Encyclopédie Universelle
Pyrophyllite — is a phyllosilicate mineral species belonging to the clay family and composed of aluminium silicate hydroxide: AlSi2O5OH. It occurs in two more or less distinct varieties, namely, as crystalline folia and as compact masses; distinct crystals are… … Wikipedia
Pyrophyllite — Py*roph yl*lite, n. [Pyro + Gr. ? leaf.] (Min.) A mineral, usually of a white or greenish color and pearly luster, consisting chiefly of the hydrous silicate of alumina. [1913 Webster] … The Collaborative International Dictionary of English
pyrophyllite — [pī΄rə fil′īt΄] n. [Ger pyrophyllit: see PYRO & PHYLL(O) & ITE1] a very soft, greasy, monoclinic mineral, AlSi2O5 (OH), that is similar to talc in structure, used as a lubricant and in making rubber, soap, etc.; hydrous aluminum silicate … English World dictionary
pyrophyllite — /puy reuh fil uyt, puy rof euh luyt /, n. Mineral. a phyllosilicate, AlSi2O5(OH), usually having a white or greenish color, and occurring in either foliated or compact masses, the latter variety being used like soapstone. [1820 30; < G… … Universalium
pyrophyllite — noun a white or greenish aluminum silicate mineral (resembles talc) • Hypernyms: ↑mineral * * * ˌpīrōˈfiˌlīt, pīˈräfəˌl noun ( s) Etymology: German pyrophyllit, from pyr + phyll + it ite : a mineral AlSi2O5(OH) that is … Useful english dictionary
Pyrophyllite — Ressemblant au talc, la pyrophyllite est un phyllosilicate d alumine. Sa formule chimique est la suivante : Al2(Si4O10)(OH)2, ou Al2O3, 4 SiO2, H2O. Elle possède une certaine aptitude à être en feuillets. L origine de son nom se décompose de … Wikipédia en Français
pyrophyllite — pirofilitas statusas T sritis chemija apibrėžtis Mineralas. formulė Al₂[(OH)₂|Si₄O₁₀] atitikmenys: angl. pyrophyllite rus. пирофиллит … Chemijos terminų aiškinamasis žodynas
pyrophyllite — noun Etymology: German Pyrophyllit, from Greek pyr + phyllon leaf more at blade Date: 1830 a soft usually white or greenish mineral that is a hydrous aluminum silicate, resembles talc, occurs in a foliated form or in compact masses, and is used… … New Collegiate Dictionary
pyrophyllite — (pi ro fil li t ) s. f. Silicate d alumine et de magnésie qui s exfolie sous l action du feu. ÉTYMOLOGIE Pyro..., et, feuille … Dictionnaire de la Langue Française d'Émile Littré
