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Bergmannite

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Torbern Olof Bergman
Formula:
Na2Al2Si3O10 · 2H2O
Name:
The name Bergmannit was introduced by Schumacher (1801) for a fibrous mineral with a dark grey to greyish with meat-red color found at Stavern (formerly Friederichsvärn), Norway. It was named for the Swedish mineralogist and chemist Torbern Olof Bergmann (1735-1784). Later named in 1815 by A.G. Werner as spreustein, which was a term widely used later.
Synonym:
A synonym of Spreustein
Hydrothermal decomposition products mainly of natrolite after nepheline.


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References for BergmanniteHide

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Schumacher, C.F (1801): Versuch eines Verzeichnisses der in den Dänisch-Nordischen Staaten sich findenden einfachen Mineralien. Kopenhagen, p.47
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp

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