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Birnessite


Birnessite : (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O

Photo Copyright © Thomas Witzke and Abraxas-Verlag  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Das Aufgeklärte Glück Mine, Hasserode, Wernigerode, Harz Mts, Saxony-Anhalt, Germany
Gray birnessite, very small crystals and massive. Picture size 7 mm. Photographer and collection Thomas Witzke.

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