Formula: Hg5O4Cl2
Origin of name: for W. Pinch, American collector
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: black to dark brown
Diaphaneity:
Luster:
Habit: blocky or platy crystals to 1 mm
Hardness: 1
Specific gravity: 9.5
Cleavage: none
Tenacity:
Streak: reddish brown
Synonyms/varieties:
Comments:
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