hausmannite

Noun
  1. A mineral consisting of manganese tetroxide;
    A source of manganese (synset 114702229)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym:
    • 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
    • manganese tetroxide - an oxide of manganese found naturally as hausmannite

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