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Figure 13
The [\star{\tt 2323}] subgroup chart. A fundamental domain for [\star{\tt 2323}] is built from the four [\star{\tt 246}] triangles labelled I, R1, R2 and R1R2. Twenty-four of these quadrilateral domains are needed to fill out a translational unit cell. One possible set of 24 quadrilaterals is the highlighted (18-sided) polygonal domain. The dodecagon bounded by yellow edges marks the translational unit cell described in Fig. 10[link]. Note how the highlighted domain differs from the (yellow) dodecagon by displacing a triangle from one edge to the diagonally opposite one.

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ISSN: 2053-2733
Volume 65| Part 2| January 2009| Pages 81-108
doi:10.1107/S0108767308040592
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