Question

Explain the magnetic properties associated with Fe203

and Fe304? ​

Answer 1

Answer:

Each crystal lattice of Iron Oxide, lets say Fe3O4 (magnetite), consists of two sublattices: (1) Octahedral and (2) Tetrahedral sublattices. Octahedral sublattice consists of Fe3+ (Ferric) and Fe2+(Ferrous) ions and their spins (magnetic moments) interact ferromagnetically while tetrahedral sublattice consists of only Fe3+ ions and their spins couple antiferromagnetically with the spins of Fe3+ ions in octahedral sublattice and cancels out. The four unpaired electrons from Fe2+ ion in octahedral sublattice contribute magnetic moment of 4 X Bohr magneton which is the magnetic moment a crystal lattice of Fe3O4 possesses.

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