 | Acta Crystallographica Section A Acta Crystallographica Section A FOUNDATIONS AND ADVANCES |
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![[Figure 10]](ae5132fig10mag.jpg)
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Figure 10
Circle packings for tenfold twins (n = 9, m = 10) of varying packing density η. Shown are the cases μ = 1 (top left, η = 0.234), μ = 2 (top right, η = 0.477) and μ = 3 (bottom left, η = 0.140), in comparison with a sunflower head consisting of 90 florets (bottom right, η = 0.546). The densest possible arrangement of 90 circles within a circle [not shown here, but depicted by Lubachevsky & Graham (1997  )] has a packing density of η = 0.809. |
![[Figure 10]](ae5132fig10.jpg)
| FOUNDATIONS ADVANCES |
ISSN: 2053-2733
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