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Ikunolite

Year of discovery: 1959 (Japan as the first occurence in the World)

Locality list: 10 localities of ikunolite

• Bi₄S₃
• Bi₄(S,Se)₃
• [Bi³⁺₄][S₃]

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

• Bi₄ => Pb₂Bi₂: Babkinite

• S => Te: Pilsenite

• S₃ => Se₂S: Laitakarite
• S₃ => TeS₂: Joséite (Joseite)
• S₃ => Te₂S: Joséite-B (Joseite-B)

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

• Habit: Platy

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 2
• Density: 7.8

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=4.2, c=39.2

Etymology: Ikuno mine in Hyogo prefecture, Japan, where this mineral was discovered for the first time.