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Aleksite

Year of discovery: 1978 (Alekseevskoye mine, Russia), 1977 (Japan)

Locality list: 4 localities of aleksite

• PbBi₂Te₂S₂
• [Pb²⁺][Bi³⁺₂][Te₂S₂]

• Class: Aleksite group < Trigonal layered Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

• S₂ => Te₂: Rucklidgeite
• Te₂S₂ => Se₄: Poubaite

• Color: Steel black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Platy, Granular

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 2.5
• Density: 7.6

• System: Trigonal
• Group: (-3)m, P(-3)m1
• Lattice: a=4.2, c=79.7

Etymology: Alekseev mine, Russia