Formula: CuAsO3OH
Origin of name: Named in honor of Klaus Yvon, professor of crystallography at the University of Geneva, Switzerland
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 7.632, b = 11.168, c = 6.02, α = 89.317°, β = 86.55°, γ = 74.733°
Colour: Turquoise blue
Diaphaneity: Transparent
Luster: Vitreous
Habit: Radial, spherical aggregates
Hardness: 3.5-4
Specific gravity: 3.2
Cleavage: [100] perfect, [10] poor
Tenacity: Brittle, irregular fracture
Streak: Blue
Synonyms/varieties:
Comments:
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