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Figure 18
A graph showing the possible space-group symmetries for a distorted structure derived from a [Pm{\overline 3}m] (No. 221) parent structure, as the result of a distortion according to the [{\rm R}_{4}^{+}] irrep. The graph provided by SUBGROUPS has been complemented with an indication of an appropriate direction of the order parameter for each symmetry. Examples of perovskite-related materials where these symmetries are realized are also indicated.

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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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