Formula: (Ag,Cu)4Au(S,Se)4
Origin of name: after locality Penzhina River, Russia
Crystal system: hexagonal
Crystal class: 622
Twinning:
Unit cell:
Colour: grayish white in reflected light
Diaphaneity:
Luster:
Habit: intergrowths of elongate or platy deposits up to 7 microns
Hardness:
Specific gravity: 8.35
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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