Abstract
GALLAGHER et al.1 have reported a mechanism for the oxidation of magnetite to γ-Fe2O3 based on cationic diffusion. According to this mechanism, the particle size of the magnetite samples plays a most important part. Particles smaller than 3,000 Å oxidize to γ-Fe2O3, whereas in the larger particles spontaneous nucleation of α-Fe2O3 occurs because of lattice strain, and the oxidation proceeds to yield hematite.
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COLOMBO, U., FAGHERAZZI, G., GAZZARRINI, F. et al. Mechanism of Low Temperature Oxidation of Magnetites. Nature 219, 1036–1037 (1968). https://doi.org/10.1038/2191036a0
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DOI: https://doi.org/10.1038/2191036a0
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