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Metavoltine, Alunogen


Metavoltine : Na6K2FeFe6(SO4)12O2·18H2O, Alunogen : Al2(SO4)3·17H2O

Photo Copyright © Thomas Witzke and Abraxas-Verlag  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany
Yellow metavoltine with colourless alunogen. Picture size 5 mm. Photographer and collection Thomas Witzke.

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