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Cubanite [abbr. Cbn ]

Year of discovery: 1843 (Barracanao, Cuba), 1937 (Japan)

Locality list: 88 localities of cubanite

• CuFe₂S₃
• [Cu²⁺][Fe²⁺₂][S₃]^6-

• Class: Cubanite group
• Class: Sulfide
• Magnetism: Ferromagnetic

• Polymorph: Isocubanite (Cubic)

• Cu => Tl: Picotpaulite
• Cu => Ag: Argentopyrite, Sternbergite

• Color: Brass
• Streak: Greenish gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic elongated to [001], Thick tabular on {001}{110}
• Striation: [010] on {001}
• Twin: {110}. 4 or 6 repeated twins. pseudohexagonal by 6 folded twin

• Cleavage: No, Parting on {110} and {1-30} (4 planes)
• Hardness: 3.5
• Density: 4.1

• System: Orthorhombic
• Group: mmm, Pcmn
• Lattice: a=6.5, b=11.1, c=6.2

Etymology: Cuba