Abstract
THE formation and stability of γ-Fe2O3 (maghaemite) is still a puzzle, as this oxide is metastable with respect to its isomorphic form α-Fe2O3 (haematite). However, there are increasing reports about its natural occurrence in certain soils and sediments (see ref. 1 and refs therein). Maghaemite, like magnetite, Fe3O4, is ferrimagnetic and its artificial occurrence may therefore be important in carrying out magnetic concentrations in various processes of iron ores industry2; as well as finding widespread application in the electronic industry3. The artificial preparation of maghaemite is usually carried out by low temperature dehydration of lepidocrocite4, γ-FeOOH, or careful oxidation of powdered magnetite5,6.
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YARIV, S., MENDELOVICI, E., VILLALBA, R. et al. Transformation of goethite to maghaemite in CsI disks. Nature 279, 519–520 (1979). https://doi.org/10.1038/279519a0
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DOI: https://doi.org/10.1038/279519a0
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