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Figure 13
The output of SUBGROUPS when calling Get_irreps for the subgroup of [Fm{\overline 3}m] of type Pnma (No. 62) indicated in Fig. 12. One can see that this Pnma subgroup is in fact among the listed compatible irrep isotropy subgroups, and therefore this symmetry can be attained by an order parameter associated with the corresponding irrep, namely DT5. The wavevector (0, 0, ½), shown in bold, within the set of wavevectors of the irrep (irrep star) is the only one involved in the irrep distortion necessary for this symmetry break.

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