Abstract
THE nature of the cubic or nearly cubic alumina called γ- or η-Al2O3 has been the subject of much speculation. Its structural similarity to the spinels has been known for many years1–3 and led to the view that γ-Al2O3 is a defect structure which can be written with aluminium ions occupying statistically 24 cation sites in the spinel structure.
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BRINDLEY, G., NAKAHIRA, M. Evidence for a Variable Long-range Order in Nearly Anhydrous Gamma Alumina. Nature 183, 1620 (1959). https://doi.org/10.1038/1831620a0
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DOI: https://doi.org/10.1038/1831620a0
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