![[Figure 1]](eo5015fig1mag.jpg)
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Figure 1
A Fermat spiral with 50 points on it, successively placed at angle ![[\theta = 2\pi s \lambda]](teximages/eo5015fi476.gif){kind=small} , with s = 0 to 49. ![[article HTML]](../../../../../graphics/viewarticleborder.gif)
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![[Figure 1]](eo5015fig1.jpg)
© International Union of Crystallography 2012
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Figure 1
A Fermat spiral with 50 points on it, successively placed at angle , with s = 0 to 49.
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