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, Fe 3O4, 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.
Original language | English |
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Pages (from-to) | 519-520 |
Number of pages | 2 |
Journal | Nature |
Volume | 279 |
Issue number | 5713 |
DOIs | |
State | Published - 1979 |