Abstract
Symmetry elements are accompanied by volumes that cannot be occupied by the centres of atoms in the unit cell. The effect of these inaccessible volumes on cumulative distribution functions of normalised intensity has been investigated in space groups belonging to crystal classes 2, m, 2/m. The modified distribution functions have been compared with the corresponding distributions based on three published structures. The validity of these distribution functions in detecting the correct space group has been demonstrated by a reasonable good agreement between theoretical and experimental plots.
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