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![[Figure 1]](sq3101fig1mag.jpg)
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Figure 1
Group–subgroup relationships among the ferroelectric perovskite space groups. Space groups connected by solid lines are allowed to undergo continuous phase transitions under Landau theory, whereas those joined by dashed lines are not. (Reproduced from Forrester et al. (2001  ) with the permission of IOP Publishing Ltd.) |
![[Figure 1]](sq3101fig1.jpg)
 | STRUCTURAL CHEMISTRY |
ISSN: 2053-2296
