On the mineralogy of nambulite, a rare manganese silicate from Namibia, Japan and Brazil
Nambulite is a rare alkali-bearing hydrous manganese silicate, which occurs in veins associated with manganese ore bodies. It is suggested that the formation of nambulite is related to late hydrothermal activities connected with a contact metamorphic event. The chemistry and structure of nambulite from three known occurrences are similar, but with differences in the alkali content and in the dimension of the unit cell.
Communications of the Geological Survey of South West Africa/Namibia
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