Maghemite

Maghemite (Fe2O3, γ-Fe2O3) is a member of the family of iron oxides structure as magnetite and is also ferrimagnetic.

Maghemite can be considered as an Fe(II)-deficient magnetite with formula ( Fe 8 III) A B O 32 {\displaystyle \left({\ce {Fe^{III}8}}\right)_{A}\left[{\ce {Fe_{40/3}^{III}\square _{8/3}}}\right]_{B}{\ce {O32}}} {\displaystyle \left({\ce {Fe^{III}8}}\right)_{A}\left[{\ce {Fe_{40/3}^{III}\square _{8/3}}}\right]_{B}{\ce {O32}}} where ◻ {\displaystyle \square } \square represents a vacancy, A indicates tetrahedral and B octahedral positioning.