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Magnesioferrite [abbr. Mfr ]

Year of discovery: 1859 (Monte Vesuvius, Ialy), 1959 (Japan)

Locality list: 10 localities of magnesioferrite

• MgFe₂O₄
• [Mg²⁺][Fe³⁺₂][O₄]

• Class: Spinel subgroup < Oxyspinel group < Spinel supergroup
• Class: Oxide
• Magnetism: Paramagnetic

• Mg => Fe: Magnetite (Series)
• Mg => Mn: Jacobsite
• Mg => Zn: Franklinite
• Mg => Ni: Trevorite
• Mg => Cu: Cuprospinel
• Mg => Ge: Brunogeierite
• Mg => Ti: Ulvöspinel (Ulvospinel)

• Fe => Al: Spinel
• Fe => Cr: Magnesiochromite
• Fe => V: Magnesiocoulsonite

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

• Cleavage: No, Parting on {111} (4 planes)
• Hardness: 5.5-6.5
• Density: 4.6

• System: Cubic
• Group: m3m, Fd3m
• Lattice: a=8.4