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Figure 5
TwinRotMat report for the merohedrally twinned CIJVEA structure showing twofold rotational twinning about [001] with the expected R1 value drop when included in the refinement. The second proposed twinning option appears to have no effect on the R1 value.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 82| Part 10| October 2026| Pages 595-602
https://doi.org/10.1107/S2053229626009319