Formula: Cu4Fe5S8
Origin of name: For Maurice Haycock, Canadian mineralogist
Crystal system: Orthorhombic
Crystal class: 222
Twinning:
Unit cell:
Colour: Brass-yellow
Diaphaneity: Opaque
Luster: Metallic
Habit: Massive
Hardness: 4
Specific gravity: 4.35
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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