SKAPOLITH, Mpapwa Tansania (Vorschaubild)
Skapolithe, abgeleitet von den griechischen Wörtern für „Stab“ und „Stein“, repräsentieren eine Kategorie von Silikatmineralien, die Gesteine bilden und aus Aluminium, Kalzium und Natriumsilikat, zusammen mit Chlor, Karbonat und Sulfat bestehen. Die beiden primären Endglieder dieser Gruppe sind Meionit mit der Formel Ca4Al6Si6O24CO3 und Marialith, dargestellt als Na4Al3Si9O24Cl. Zusätzlich ist Silvialith mit der Zusammensetzung (Ca,Na)4Al6Si6O24(SO4,CO3) ebenfalls als Mitglied der Skapolithgruppe anerkannt.
Aus der ehemaligen Schneider's Rocks & Minerals Collection, Poway CA, USA
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