Application and comparison of different tests on twinning by merohedry
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Updated: Oct 15, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
Published on: May 19, 2014
1FB Geowissenschaften (Kristallographie), Universität Bremen, Klagenfurter Strasse, D-28359 Bremen, Germany. vkahlen@min.uni-bremen.de
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.
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