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Figure 1
A square torus diagram, delineating regions with different sign combinations for the unit quaternion components. Rectangular regions with identical gray shading are translationally identical but have opposite sign for all quaternion components. Periodic boundary conditions apply in both horizontal and vertical directions.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 3| June 2024| Pages 638-648
https://doi.org/10.1107/S160057672400219X
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