Sohncke groups

From Online Dictionary of Crystallography

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Groupes de Sohncke (Fr), Gruppi di Sohncke (It).

Sohncke groups are called the 65 three-dimensional space groups containing only operations of the first kind (rotations, rototranslations, translations). It is very generally accepted that enantiomerically-pure compounds (e.g. proteins) crystallise in these groups.