Effects of merohedric twinning on the diffraction pattern

The effect of merohedric twinning on the reflection conditions and the symmetry of the diffraction pattern is analysed systematically and criteria to confirm or exclude the presence of twinning are presented.

Effects of merohedric twinning on the diffraction pattern. Erratum and corrigenda

A number of corrections are made to the article by Nespolo et al. [Acta Cryst. (2014), A70, 106-125 ].