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manganite

[mang-guh-nahyt] /ˈmæŋ gəˌnaɪt/
noun
1.
a gray to black mineral, hydrous manganese oxide, MnO(OH); gray manganese ore.
2.
Chemistry. any of a series of salts containing tetravalent manganese and derived from either of two acids, H 4 MnO 4 or H 2 MnO 3 .
Origin of manganite
1820-1830
First recorded in 1820-30; mangan(ese) + -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for manganite

manganite

/ˈmæŋɡəˌnaɪt/
noun
1.
a blackish mineral consisting of basic manganese oxide in monoclinic crystalline form: a source of manganese. Formula: MnO(OH)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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