Formula: FeSbS
Origin of name: Locality; Gudmundstorp, Sweden
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Silver-white to steel-gray
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals prismatic; twinned forming butterfly and cruciform twins
Hardness: ~ 6
Specific gravity: 6.72
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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