Formula: Mn7Zn4(AsO4)2(SiO4)2(OH)8
Origin of name: For John Kolic, American discoverer of mineral
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Yellow-orange
Diaphaneity:
Luster: Vitreous
Habit: Crystals have pinacoidal and pyramidal forms, rare; fractured grains
Hardness: 4.5
Specific gravity: 4.17
Cleavage: None
Tenacity:
Streak: Bright orange
Synonyms/varieties:
Comments:
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