Formula: Bi2Cu3(OH)2O2(PO4)2 . 2H2O
Origin of name: For Zdenek Mrazek, Czech mineralogist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Bright blue
Diaphaneity: Transparent
Luster: Vitreous
Habit: Needles to 2 mm, sometimes in rosettes; elongate to 0.5 mm at second locality
Hardness: 2 to 3
Specific gravity: 4.90
Cleavage: 1; {20-1}
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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