Acta Cryst. (1999). B55, 745-751 [ doi:10.1107/S010876819900590X ]
Abstract: Three different tests on twinning by merohedry from the literature have been applied to single-crystal data sets of five different inorganic crystal structures. Although the three test procedures differ significantly with regard to their efficiency, in both detecting the existence of twinning and estimating the volume fractions of the twin individuals, they represent useful tools in the early stages of a structure analysis and should be applied routinely in the preliminary stage of a structure determination whenever a twinning by merohedry is possible.
Keywords: Twinning; Merohedry.
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