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Laitakarite

Year of discovery: 1959 (Orijärvi, Finland), 1963 (Japan)

Locality list: 4 localities of laitakarite

• Bi₄Se₂S
• Bi₄(Se,S)₃
• [Bi³⁺₄][Se₂S]

• Class: Joséite (Joseite) group
• Class: Selenide

• Se => S: Ikunolite
• Se => Te: Joséite-B (Joseite-B)

• SeSe₂S => Te₃: Pilsenite
• Se₂S => TeS₂: Joséite (Joseite)

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

• Habit: Foliated

• Cleavage: {0001} Perfect (1 plane)
• Hardness: 2
• Density: 8.1

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=4.2, c=39.9

Etymology: Aarne Laitakari, Finnic collector who collected the first specimen.