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Figure 9
Modified Bärnighausen tree of all possible 1:3 A-site-ordered low-symmetry phases which was constructed using the ITC approach with the same limitations as in the R-approach (2a, 2b, 2c maximal primitive cell, only commensurate phases and 1:3 splitting type of 1a Wyckoff position of archetype structure). The irreps are designated in red. The numbers of phases from Table 2[link] are designated in green. All translations of the primitive cells of the low-symmetry phases in this figure relate to the primitive cell of the aristotype phase, which may vary for different phases of the hettotypes. In Table 2[link], all translations are given relative to the primitive cell of a parent perovskite structure (archetype) that is common to all low-symmetry phases.

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ISSN: 2053-2733
Volume 75| Part 2| March 2019| Pages 379-397
https://doi.org/10.1107/S2053273318018338
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