Formula: Cu3SbSe4
Origin of name: Named for Francois Permingeat (1917-1988), mineralogist, University of Toulouse, France.
Crystal system: tetragonal
Crystal class: 4 2m
Twinning:
Unit cell: a = 5.63, c = 11.23
Colour: light brownish pink (polished section)
Diaphaneity: opaque
Luster: metallic
Habit: massive, small grains
Hardness: 4 to 4.5
Specific gravity: 5.82
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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