Formula: Pb5Cu5Bi7S18
Origin of name: For O. Friedrich, Austrian geologist
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell:
Colour: Creamy yellow when polished
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals; granular aggregates
Hardness: 4
Specific gravity: 6.98
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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