Infrared investigation of aluminum- and chromium-substituted magnetites and of the lacunar spinels resulting from their oxidation

When Fe 3+ ions are substituted by aluminum or chromium on magnetite octahedral sites, the ir spectrum shows the conversion of an inverse spinel to a normal spinel. Both broad bands of magnetite are gradually replaced by the four characteristic bands of normal spinels II–III. They are also observed...

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Bibliographic Details
Published in:Journal of solid state chemistry 1977, Vol.21 (4), p.375-385
Main Authors: Gillot, B., Bouton, F., Ferriot, J.F., Chassagneux, F., Rousset, A.
Format: Article
Language:English
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Summary:When Fe 3+ ions are substituted by aluminum or chromium on magnetite octahedral sites, the ir spectrum shows the conversion of an inverse spinel to a normal spinel. Both broad bands of magnetite are gradually replaced by the four characteristic bands of normal spinels II–III. They are also observed for solid solutions, FeCr 2O 4FeAl 2O 4, with, however, a further band at 780 cm −1 which may be assigned to Al 3+ ions on tetrahedral sites. Low-temperature (
ISSN:0022-4596
1095-726X
DOI:10.1016/0022-4596(77)90135-9