psilomelane(redirected from Black hematite)
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A mixture of black manganese oxide minerals.
[Greek psīlos, bare + Greek melās, melan-, black.]
(Minerals) a common black to grey secondary mineral consisting of hydrated basic oxide of manganese and barium: a source of manganese. Formula: BaMn9O16(OH)4. Also called: romanicite
[C19: from Greek psilos bare + melas black]
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|Noun||1.||psilomelane - a mineral consisting of hydrated basic oxide of manganese and barium; 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