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Figure 3
(a) Projected unit cell of an idealized (cubic) γ-Al2O3 spinel structure. The numbers located within the circles representing the atomic positions give the z coordinates in multiples of [\ {{1}\over{8}}a]. Further panels give an overview of considered planar defects: (b) conservative APB of the type [(001)\ {{1}\over{4}}[110]], (c) non-conservative APB [(001)\ {{1}\over{4}}[10{\overline 1}]], (d) non-conservative APB [(001)\ {{1}\over{4}}[21{\overline 1}]] introduced by the rotation of the γ-Al2O3 unit cell around the [001] direction, (e) non-conservative APB [(110)\ {{1}\over{4}}[{\overline 1}0{\overline 1}]] and (f) conservative APB [(111)\ {{1}\over{4}}[10{\overline 1}]]. More detailed models are provided in the supporting information.

IUCrJ
Volume 6| Part 1| January 2019| Pages 116-127
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518015786