Formula: (Pb,Sn)12.5Sn5FeAs3S28
Origin of name:
Crystal system: Monoclinic
Crystal class:
Twinning:
Unit cell:
Colour: Dark gray
Diaphaneity:
Luster:
Habit:
Hardness:
Specific gravity:
Cleavage:
Tenacity:
Streak:
Synonyms/varieties: As-Franckeite
Comments:
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