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Dyscrasite

Year of discovery: 1832 (Wenzel mine, Germany), 1953 (Japan)

Locality list: 4 localities of dyscrasite

• Ag₃Sb
• [Ag⁺₃][Sb]^3-

• Class: Dyscrasite group
• Class: Antimonide
• Insoluble in: HCl

• Color: Silver white
• Tarnish: Yellow-Black
• Streak: Silver white
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic, Acicular, Tabular
• Aggregate: Massive, Foliated
• Twin: {110}, Pseudohexagonal, V-shaped

• Cleavage: Distinct on {001} and {011} (3 planes), Indistinct on {110} (2 planes)
• Hardness: 3.5-4
• Density: 9.7

• System: Orthorhombic, Pseudohexagonal by twinning
• Group: mm2, Pmm2
• Lattice: a=3.0, b=4.8, c=5.2

Etymology: Bad alloy in Greek