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Manganosite is a rare mineral composed of manganese(II) oxide MnO. It was first described in 1817 for an occurrence in the Harz Mountains, Saxony-Anhalt, Germany.[2] It has also been reported from Langban and Nordmark, Sweden and at Franklin Furnace, New Jersey. It also occurs in Japan, Kyrgyzstan and Burkina Faso.[3]

It occurs in manganese nodules. It also occurs as alteration of manganese minerals such as rhodocrosite during low oxygen metamorphism and metasomatism[3]


1. ^ http://webmineral.com/data/Manganosite.shtml Webmineral data
2. ^ a b http://www.mindat.org/min-2503.html Mindat
3. ^ a b c http://www.handbookofmineralogy.org/pdfs/manganosite.pdf Handbook of Mineralogy

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