Buserite

minerals

asbolane

todorokite

birnessite

Formula: Na4Mn14O27.21H2O (?)
Hydrated oxide
Environments

Stream beds and hot spring deposits

Buserite is an unstable manganese oxide that dehydrates to birnessite. It has been found in stream beds, in a hot spring deposit, deposited from rhodochrosite mine wastewater and possibly also in deep sea manganese nodules (Mindat).

Localities

The original material was reported from the Yuno-Taki waterfall, Me-akan volcano, Akan National Park, Kushiro Province, Hokkaido Island, Japan (Mindat).

At Pinal Creek, Arizona, USA, it is suggested that the birnessite or ranciéite and todorokite found in the creek crusts may be transformation products of a buserite precursor (AM 87.580-591). Todorokite is considered to be amixture of buserite and its breakdown products birnessite and manganite (AM 68.972-980).

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