manganite(redirected from Gray manganese ore)
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A steel-gray to black mineral, MnO(OH), found in North America and Europe; manganese oxide.
(Minerals) a blackish mineral consisting of basic manganese oxide in monoclinic crystalline form: a source of manganese. Formula: MnO(OH)
1. a gray to black mineral, hydrous manganese oxide, MnO(OH); gray manganese ore.
2. any of a series of salts containing tetravalent manganese and derived from either of two acids, H4MnO4 or H2MnO3.
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|Noun||1.||manganite - a black mineral consisting of basic manganese oxide; a source of manganese|
atomic number 25, manganese, Mn - a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition