plagionite definition

  • noun:
    • A monoclinic-prismatic mineral containing antimony, lead, and sulfur.
    • A sulphide of lead and antimony, of a blackish lead-gray color and metallic luster.
    • A sulphid of antimony and lead, happening in oblique monoclinic crystals as well as in huge kinds. It's a dark leadgray shade and metallic luster.
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