Formula: (Pb,Tl)3As5S10
Origin of name: for G. vom Rath, German mineralogist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: lead-gray, tarnishes iridescent
Diaphaneity: opaque
Luster: metallic
Habit: crystals prismatic, striated along elongation
Hardness: 3
Specific gravity: 5.37
Cleavage: 2; {100} perfect, {010} parting
Tenacity:
Streak: dark brown
Synonyms/varieties:
Comments:
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