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Figure 6
Typical X-ray patterns taken in the three phases. (a) At 50 K, for this X-ray pattern the λ/2 contribution has been suppressed. The red circles indicate the (½ 0 0) satellite reflections and the blue circles indicate the (0 ½ ½) satellite reflections. (b) At 110 K, the red arrows indicate the diffuse lines associated with the regime of quasi-one-dimensional fluctuations of the SP transition and the blue circles indicate the (0 ½ ½) satellite reflections. (c) At 135 K, the red arrows indicate the diffuse lines associated with the regime of quasi-one-dimensional fluctuations of the SP transition and the blue arrows show the isotropic regime of fluctuation associated with the anion ordering.

IUCrJ
Volume 5| Part 3| May 2018| Pages 361-372
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518004967