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Faujasite
Faujasite is a mineral group in the zeolite family of silicate minerals. The group consists of faujasite-Na, faujasite-Mg and faujasite-Ca. They all share the same basic formula: (Na2,Ca,Mg)3.5()·32(H2O) by varying the amounts of sodium, magnesium and calcium.〔(The Faujasite group on Mindat )〕 It occurs as a rare mineral in several locations worldwide and is also synthesized industrially. ==Discovery and occurrence== Faujasite was first described in 1842 for an occurrence in the Limberg Quarries, Sasbach, Kaiserstuhl, Baden-Württemberg, Germany. The sodium modifier faujasite(Na) was added following the discovery of the magnesium and calcium rich phases in the 1990s. It was named for Barthélemy Faujas de Saint-Fond (1741–1819), French geologist and volcanologist.〔〔 Faujasite occurs in vesicles within basalt and phonolite lava and tuff as an alteration or authigenic mineral. It occurs with other zeolites, olivine, augite and nepheline.〔
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