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Friedrichite

Year of discovery: 1977 (Sedl, Austria), 2010 (Japan)

Locality list: A locality of friedrichite

• Cu₅Pb₅Bi₇S₁₈
• [Cu⁺₅][Pb²⁺₅][Bi³⁺₇][S₁₈]^36-

• Class: Aikinite-Bismuthinite series < Aikinite-Bismuthinite group < Rod-type Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

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

• Color: Gray
• Luster: Metallic
• Diaphaneity: Opaque

• Hardness: 3.5-4
• Density: 7.0

• System: Orthorhombic
• Group: mm2, Pb2₁m
• Lattice: a=33.8, b=11.7, c=4.0