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Figure 8
t-Plots of the positional modulation of atoms S1a_1 (thin solid line) and S1a_2 (thick dashed line; symmetry transformation applied) in phase III at 40 K. The two atoms would be related by a twofold screw axis in the monoclinic phases I and II. We can see that they do not deviate much from this monoclinic symmetry. Commensurate t-sections are indicated by vertical dashed lines.

IUCrJ
Volume 8| Part 1| January 2021| Pages 139-147
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520015912