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Magnetite - Fe₃O₄

Classification: Oxide
Atomic numbers: 26 & 8
Atomic weight: 231.52
Melting point (C): 1538
Boiling point (C):
Density (g/cm3): 5.16-5.18
Refractive index (n=):
Hardness (Mosh-scratch): 5.5-6.5
Crystal structure: Isometric-normal: (111) octahedron
Color (solid): Solid: Iron/black, thin section: Colorless/brown
Cleavage: Octahedral-indistinct: (111)
Magnetism: Solid-undirectional: Strong, Lodestone: N-S polarity