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Ammonioalunite, Kaolinite


Ammonioalunite : (NH4)Al3[(OH)3|SO4]2, Kaolinite : Al2Si2O5(OH)4

Photo Copyright © 2007, J. Weissman, courtesy of Photographic Guide to Mineral Species  - Creative Commons Non-Commercial No Derivatives Licence - Some Rights Reserved
Locality: Schoeller Mine (Schöller Mine), Kladno, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic
White chalky ammonioalunite on darker kaolinite. Specimen courtesy of Excalibur Mineral Company. About 1 cm horizontal width. S101-036

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