Formula: Cu3BiS3
Origin of name: for locality, Neuglück Mine, Wittichen, Baden, Germany
Crystal system: Orthorhombic
Crystal class: 222
Twinning:
Unit cell: a = 7.66, b = 10.31, c = 6.69
Colour: Steel gray to tin-white, tarnishes to lead gray, brass-yellow or iridescent
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals prismatic to thick tabular, prisms striated, acicular, columnar, massive
Hardness: 2 to 3
Specific gravity: 6.19
Cleavage: None
Tenacity: Brittle
Streak: Black
Synonyms/varieties:
Comments:
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