γ-Alumina: a single-crystal X-ray diffraction study

γ-Alumina: a single-crystal X-ray diffraction study

The structure of γ‐alumina (Al21+1/3□2+2/3O32) crystals obtained as a product of a corrosion reaction between β‐sialon and steel was refined in the space group Fdm. The oxygen sublattice is fully occupied. The refined occupancy parameters are 0.83 (3), 0.818 (13), 0.066 (14) and 0.044 (18) for Al io...

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Veröffentlicht in:Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2006-09, Vol.62 (9), p.i83-i84
Hauptverfasser: Langer, Vratislav, Křes?an, Jan, Smrčok, Ľubomír
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Exact sciences and technology
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Theory of crystal structure, crystal symmetry
calculations and modeling
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Zusammenfassung:The structure of γ‐alumina (Al21+1/3□2+2/3O32) crystals obtained as a product of a corrosion reaction between β‐sialon and steel was refined in the space group Fdm. The oxygen sublattice is fully occupied. The refined occupancy parameters are 0.83 (3), 0.818 (13), 0.066 (14) and 0.044 (18) for Al ions in 8a, 16d, 16c and 48f positions, respectively. The Al ions are distributed over octa­hedral and tetra­hedral sites in a 63:37 ratio, with 6% of all Al ions occupying non‐spinel positions.
ISSN:0108-2701
1600-5759
DOI:10.1107/S0108270106026850