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Delafossite

Year of discovery: 1873 (Mednorudyanskoye deposit, Russia), 1935 (Japan)

Locality list: 3 localities of delafossite

• CuFeO₂
• [Cu⁺][Fe³⁺][O₂]^4-

• Class: Oxide
• Magnetism: Paramagnetic (After heating)

• Fe => Mn: Crednerite
• Fe => Cr: Mcconnellite
• Fe => Cu: Tenorite

• Color: Black
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Cleavage: Imperfect on {1010} (3 planes)
• Hardness: 5.5
• Density: 5.4

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=3.0, c=17.1