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Figure 4
The unit cell (gray edges) and the ASU (blue edges) with four adjacent copies of the ASU (light blue) of the wallpaper group p3. The green triangles indicate points with rotational threefold symmetry. The arcs indicate the closed paths around singular points of the orbifold Op3 and the labels α, β indicate identified edges. See text for further details.

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ISSN: 2053-2733
Volume 77| Part 4| July 2021| Pages 317-326
https://doi.org/10.1107/S2053273321004320
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