Formula: CuMn14Fe(AsO3)5(SiO4)2(AsO4)(OH)6
Origin of name: From Greek for two and stranger
Crystal system: Hexagonal
Crystal class: 3
Twinning:
Unit cell:
Colour: Bronze to nearly black
Diaphaneity: Translucent
Luster: Metallic to resinous
Habit: Massive; aggregates of thin folia
Hardness: 3 to 4
Specific gravity: 4.2
Cleavage: 1; {0001} perfect, micaceous
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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