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Figure 3
Precession image (hhl) zone, created from a total of 4182 detector frames showing superstructure reflections (blue boxes) at odd-integer hkl values corresponding to the Fm3m perovskite unit cell (or half-integer hkl if the Pm3m description is used). As the Fm3m symmetry applies only due to superstructure ordering, the underlying basic structure being Pm3m, the main lattice reflections have only even hkl indices, while superstructure peaks have odd hkl indices.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 82| Part 2| April 2026| Pages 131-142
https://doi.org/10.1107/S2052520626000703
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