Formula: AgHgAsS3
Origin of name: For P. Laffitte, French geologist
Crystal system: Monoclinic
Crystal class: m
Twinning:
Unit cell:
Colour: Dark red
Diaphaneity: Opaque to translucent
Luster: Metallic, adamantine
Habit: Grains < 1 mm
Hardness: 3
Specific gravity: 6.07
Cleavage: 1; Imperfect
Tenacity:
Streak: Brownish-red
Synonyms/varieties:
Comments:
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