 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 3]](av5005fig3mag.jpg)
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Figure 3
Lattice Voronoi–Dirichlet polyhedra in: (a) body-centred cubic packing; (b) cubic close-packing; (c) hexagonal close-packing; (d) cyclohexane-II – all faces shown, note the presence of two small faces; (e) cyclohexane-II with small faces removed, cf. (b); (f) piperazine; (g) piperidine; (h) morpholine. Combinatorial types (Peresypkina & Blatov, 2000a  ) can be written f/v − n, where f is the number of faces and v the number of vertices; n is just an ordinal number to distinguish different VDPs where f and v are equal. These are: (a) 14/24–1, (b) 12/14–1, (c) 12/14–2, (d) 14/24–1, (e) 12/20–2, (f) 12/18–1, (g) 12/20–1 and (h) 12/20–1. Differences arise in the number of vertices present in related structures, e.g. compare the top-left vertices of (b) and (e). |
![[Figure 3]](av5005fig3.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
