Formula: Cu3AsO4(OH)3
Origin of name: for Gilbert Mari (1944-), mineralogist at the University of Nice-Sophia Antipolis, France.
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 5.445, b = 5.873, c = 5.104, α = 115°, β = 93°, γ = 92°
Colour: Greenish blue
Diaphaneity: Transparent
Luster: Vitreous
Habit: Rosettes, microscopic crystals
Hardness: 3
Specific gravity:
Cleavage: None
Tenacity: Brittle
Streak: Greenish blue
Synonyms/varieties:
Comments:
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