MAGHEMITE

'Maghemite' (Fe₂O₃, γ-Fe₂O₃) is a member of the family of iron oxides. It has the same structure as magnetite, that is, it is spinel ferrite and is also ferrimagnetic. ''Maghemite'' can be considered as an Fe(II)-deficient magnetite with formula
$(mathrm\{Fe\}^mathrm\{III\}\_8)\_A[mathrm\{Fe\}^\{mathrm\{III\}\}\_\{40/3\}square\_\{8/3\}]\_Bmathrm\{O\}\_\{32\}$ where
$square$ represents a vacancy, $A$ indicates tetrahedral positioning and $B$ octahedral.
Maghemite is formed by the topotactic oxidation of magnetite.

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See also

★ List of Minerals