Formula: Cu3(PO4)(OH)3
Origin of name: For Jules Cornet, Belgian geologist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 10.88 Å, b = 14.10 Å, c = 7.11 Å
Colour: Dark blue to greenish blue
Diaphaneity:
Luster: Vitreous
Habit: Crystals short prismatic to equant; crusts of minute crystals
Hardness: ~ 4.5
Specific gravity: 4.10
Cleavage: None
Tenacity: Brittle
Streak:
Synonyms/varieties:
Comments:
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