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Mimetite (Photo)

Year of discovery: 1835 (Treue Freundschaft mine, Germany), 1895 (Japan)

Locality list: 39 localities of mimetite

• Pb₅(AsO₄)₃Cl
• [Pb²⁺₅][Cl|(AsO₄)₃]^10-

• Class: Apatite group - Apatite supergroup
• Class: Arsenate - Chloride
• Soluble in: HNO₃, KOH
• Insoluble in: HCl
• Fluorescence: UV excitation (Orange)
• Electrical: Piezoelectric
• Odor: Garlic odor (by heating)
• Alter to Bayldonite.

• Pb => Ca: Turneaureite
• Pb => Pb₃Ca₂: Hedyphane (Series)

• AsO₄ => PO₄: Pyromorphite (Series)
• AsO₄ => VO₄: Vanadinite (Series)

• Color: Pale yellow, Yellowish brown
• Streak: White
• Luster: Resinous
• Diaphaneity: Transparent-Translucent

• Habit: Hexagonal Prismatic
• Aggregate: Radial

• Cleavage: Poor on {1011} (3 planes)
• Hardness: 3.5-4
• Density: 7.2

• System: Hexagonal, Monoclinic (M, 2M)
• Group: 6/m, P6₃/m
• Lattice: a=10.3, c=7.5

Etymology: Mimetes (Impostor) in Greek, as it looks like Pyromorphite.