Plagionite

Pla´gi`o`nite

(Min.) A sulphide of lead and antimony, of a blackish lead-gray color and metallic luster.

[′plā·jē·ə‚nīt] (mineralogy) Pb₅Sb₈S₁₇ A lead-gray mineral with metallic appearance, composed of sulfide of lead and antimony.

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