... size¹

Remainder: in this manual we operate exclusively in a scattering vector units $q=\frac{4\pi \sin \theta }{\lambda }$. Line widths $FW\frac{1}{5}M$ and $FW\frac{4}{5}M$ are expressed consequently in q, so in Å^-1. Respectively, quantities related to sizes in real space (e.g. <R> and $\sigma$) are given in Å.

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