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Clinoclase (Photo)

Year of discovery: 1830 (Wheal gorland, UK), 1947 (Japan)

Locality list: 9 localities of clinoclase

• Cu₃AsO₄(OH)₃
• [Cu²⁺₃][(OH)₃|AsO₄]^6-

• Class: Clinoclase group
• Class: Arsenate - Hydroxide

• Polymorph: Gilmarite (Triclinic)

• Color: Dark blue
• Streak: Pale bluish green
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Acicular, Thin prismatic
• Aggregate: Reniform

• Cleavage: Perfect on {001} (1 planes)
• Hardness: 2.5-3
• Density: 4.4

• System: Monoclinic
• Group: 2/m, P2₁/c
• Lattice: a=12.4, b=6.5, c=7.3, β=99.6