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Figure 5
Generating the point group [10mm^\prime] requires two generators: the rotation [\widehat{C}_{10}] of angle [\pi/5] and the mirror [\widehat{m}^\prime]. This point group has 20 elements corresponding to the symmetry of the regular decagon. It is the intrinsic symmetry group of the five-dimensional lattice that keeps the physical space [{\bf E}_\parallel] invariant.

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ISSN: 2053-2733
Volume 73| Part 6| November 2017| Pages 427-437
https://doi.org/10.1107/S2053273317013882
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