Formula: Cu3Bi(SeO3)2O2Cl
Origin of name: For Glyn Francis, Australian mineralogist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Bright green
Diaphaneity: Transparent
Luster:
Habit: Bladed crystals to 0.25 mm long
Hardness: 3 to 4
Specific gravity:
Cleavage: None
Tenacity:
Streak: Pale green
Synonyms/varieties:
Comments:
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