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Aikinite

Year of discovery: 1843 (Berezovsk mine, Russia), 1935 (Japan)

Locality list: 17 localities of aikinite

• CuPbBiS₃
• [Cu⁺][Pb²⁺][Bi³⁺][S₃]^6-

• Class: Aikinite-Bismuthinite series < Aikinite-Bismuthinite group < Rod-type Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt
• Soluble in: HNO₃ (Decompose)

• CuPb => Bi[]: Bismuthinite (Series)
• CuPb => (CuPb)_0.17(Bi[])_0.83: Pekoite (Series)
• CuPb => (CuPb)_0.33(Bi[])_0.66: Gladite (Series)
• CuPb => (CuPb)_0.40(Bi[])_0.60: Salzburgite (Series)
• CuPb => (CuPb)_0.43(Bi[])_0.57: Paarite (Series)
• CuPb => (CuPb)_0.50(Bi[])_0.50: Krupkaite (Series)
• CuPb => (CuPb)_0.67(Bi[])_0.33: Emilite (Series)
• CuPb => (CuPb)_0.83(Bi[])_0.17: Friedrichite (Series)

• Bi => Sb: Bournonite
• Bi => As: Seligmannite

• Color: Dark gray
• Tarnish: Copper red - Iridescent
• Streak: Dark gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic, Acicular
• Aggregate: Radial
• Striation: [001]

• Cleavage: Imperfect on {010} (1 plane)
• Hardness: 2-2.5
• Density: 7.1

• System: Orthorhombic
• Group: mmm, Pnma
• Lattice: a=11.6, b=4.0, c=11.3

Etymology: Dr. A. Aikin from U.K.