Formula: AgPb2Cu6Bi11S22
Origin of name: of K. Padera, Czech mineralogist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: steel-gray, tarnishes black
Diaphaneity: opaque
Luster: metallic
Habit: submicroscopic intergrowths with other sulfides
Hardness:
Specific gravity: 6.91
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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