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Nuffieldite

Year of discovery: 1968 (British Columbia Molybdenum mine, Canada), 2013 (Japan)

Locality list: A locality of nuffieldite

• Pb₂CuPbBi₂S₇
• Pb₂Cu(Pb,Bi)Bi₂S₇
• [Pb²⁺₂][Cu²⁺][Pb²⁺][Bi³⁺₂][S₇]^14-

• Class: Pseudotetragonal-Pseudohexagonal layered Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Color: Gray
• Tarnish: Grayishi green, Reddish brown
• Streak: Grayish black
• Luster: Metallic
• Diaphaneity: Opaque

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 3.5-4
• Density: 7.0

• System: Orthorhombic
• Group: mmm, Pbnm
• Lattice: a=14.6, b=21.4, c=4.0