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Figure 9
A group–subgroup graph showing all the possible subgroup symmetries that can have a distorted perovskite structure, i.e. a structure with parent space group [Pm{\overline 3}m] (No. 221) and occupied Wyckoff positions 1a, 1b and 3d (or 3c), if the distortion is of displacive type and the lattice is maintained. Symmetries only attainable by a lattice strain are not included.

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APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 5| October 2024| Pages 1650-1666
https://doi.org/10.1107/S1600576724008070
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