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Sartorite

Year of discovery: 1868 (Lengenbach quarry, Switzerland), 1997 (Japan)

Locality list: A locality of sartorite

• PbAs₂S₄
• [Pb²⁺][As³⁺₂][S₄]^8-

• Class: Sartorite subgroup < Sartorite group < Large 2D fragment Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

• As => Sb: Guettardite, Twinnite

• Color: Dark gray
• Streak: Dark brown
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic
• Striation: [010]
• Twin: {100} repeated

• Cleavage: Good on {100} (1 plane)
• Hardness: 3
• Density: 5.1

• System: Monoclinic, Pseudo-orthorhombic
• Group: 2/m, P2₁/m
• Lattice: a=19.6, b=7.9, c=4.2, β=90.0

Etymology: Professor Sartorius von Waltershausen (1809-1876), German mineralogist who described this mineral for the first time.