Haüyne | #Geology #GeologyPage Chemical Formula: - TopicsExpress

Haüyne | #Geology #GeologyPage Chemical Formula: (Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2 Locality: Vesuvian lavas, on Mte Somma, Italy. Name Origin: Named after the French crystallographer, R. J. Hauy (1743-1822). Hauyne, haüyne or hauynite was first described in 1807 from samples discovered in Vesuvian lavas in Monte Somma, Italy, and was named in 1807 by Brunn-Neergard for the French crystallographer René Just Haüy (1743–1822). It is a tectosilicate mineral with sulfate, with endmember formula (Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2. As much as 5 wt % K2O may be present, and also H2O and Cl. It is a feldspathoid and a member of the sodalite group. Read more : geologypage/2014/04/hauyne.html Geology Page geologypage

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