epistilbite

epistilbite

      hydrated sodium and calcium aluminosilicate mineral in the zeolite family. It forms piezoelectric crystals of monoclinic symmetry and platy habit; the latter property has caused epistilbite to be assigned to a group typified by heulandite (q.v.). More recently, X-ray diffraction studies have shown that the three-dimensional structure of epistilbite's aluminosilicate framework has features in common with that of mordenite (q.v.), which forms equant crystals. The chemical composition of the crystallographic unit cell (the smallest repeated component of the three-dimensional lattice) of epistilbite is approximately CaAl2Si6O16·5H2O. Isolated specimens of the mineral have been found in New York, on the island of Jersey, and—with other zeolites—in Hawaii.

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Universalium. 2010.

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  • Epistilbite — Ep i*stil bite, n. [Pref. epi + stilbite.] (Min.) A crystallized, transparent mineral of the Zeolite family. It is a hydrous silicate of alumina and lime. [1913 Webster] …   The Collaborative International Dictionary of English

  • epistilbite — |epə̇, |epē+ noun Etymology: German epistilbit, from epi + stilbit stilbite : a zeolitic mineral CaAl2Si6O165H2O consisting of aluminosilicate of calcium and occurring in usually white prismatic crystals or granular forms * * * epistilbite /ep i… …   Useful english dictionary

  • épistilbite — (entrée créée par le supplément) (é pi stil bit t ) s. f. Terme de minéralogie. Silicate double de chaux et d alumine cristallisée …   Dictionnaire de la Langue Française d'Émile Littré

  • epistilbite — epi·stilbite …   English syllables

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  • heulandite — /hyooh leuhn duyt /, n. a white or transparent, colorless mineral of the zeolite family, hydrous calcium aluminum silicate, CaAl2Si7O18·6H2O, occurring in basic volcanic rocks in the form of crystals with a pearly luster. [1815 25; named after… …   Universalium

  • Epistilbita — General Categoría Minerales tectosilicatos Clase 9.GD.45 (Strunz) Fórmula química …   Wikipedia Español

  • Stilbite — from Kiui Island, Alaska, USA General Category Zeolite Chemical formul …   Wikipedia

  • Johann August Friedrich Breithaupt — était un minéralogiste allemand né à Probstzella, en Allemagne, le 16 mai 1791 et mort à Freiberg, Allemagne le 22 septembre 1873. Buste de Breithaupt à la Werner Bau de Freiberg Biographie Il étudie les mathématiques et les sciences à… …   Wikipédia en Français

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