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Figure 6
[F_{o}+\Delta F] relaxation of the modulus constraint in the charge flipping algorithm. A selected structure factor before and after this step [[G({\bf h}) \rightarrow F({\bf h})]] is plotted by empty and red symbols in the complex plane for a few possible cases. The measured [F_{\rm obs}({\bf h})] defines the radius of the (bold) circle that is the centre of the mirror operation and the parameter W defines a (shaded) ring that limits the change of the modulus.

ISSN: 2053-2733
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