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Figure 5
In a square structure, the blue layer transforms into the red one according to four different equivalent rotations: 1, a rotation α = 2δ around the center [\Omega_{0}], node of the 0-lattice (black); 2, a rotation [\alpha+\pi/2] around the center [\Omega_{\pi/2}], node of the [\pi/2] lattice (orange); 3, a rotation α + π around the center [\Omega_{\pi}], node of the π-lattice (cyan); 4, a rotation α + 3π/2 around the center [\Omega_{3\pi/2}], node of the [3\pi/2]-lattice (green). All these four lattices are part of the zero locus.

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ISSN: 2053-2733
Volume 81| Part 2| March 2025|
https://doi.org/10.1107/S2053273324012087
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