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Fraipontite
Fraipontite is a zinc aluminium silicate mineral with a formula of (Zn,Al)3(Si,Al)2O5(OH)4.〔(Handbook of Mineralogy )〕〔(Mindat.org )〕 It is a member of the kaolinite-serpentine mineral group and occurs as an oxidation product of zinc deposits. It occurs with smithsonite, gebhardite, willemite, cerussite and sauconite.〔 It was first described in 1927 for an occurrence in Vieille Montagne, Verviers, Liège Province, Belgium.〔 It was named for Julien Jean Joseph de Fraipont (1857–1910), and Charles de Fraipont, geologists of Liege, Belgium.〔(Webmineral data for fraipontite )〕 In addition to the type locality in Belgium, it has been reported from Tsumeb, Namibia; Laurium, Greece; Swaledale, North Yorkshire, England; the Silver Bill mine, Cochise County, Arizona, the Blanchard Mine, Socorro County, New Mexico and the Mohawk mine, San Bernardino County, California in the USA; and from the Ojuela mine, Mapimi, Durango, Mexico.〔 A synonym for fraipontite is zinalsite which was reported in 1956 for an occurrence in Kazakhstan.〔(Zinalsite on Webmineral )〕〔(Zinalsite on Mindat )〕 ==References==
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