Two-dimensional packing and pseudosymmetry.
It is possible to understand, or at least rationalize, the occurrence of pseusosymmetry elements in some crystals as a consequence of a higher symmetry in a two-dimensional layer being obscured by the three-dimensional packing of the layers. Six examples, including both simple compounds and co-crystals and involving six different symmetries, are described.
Britton
D
D
Department of Chemistry, University of Minnesota, Minneapolis, MN 55455-0431, USA. britton@chemsun.chem.umn.edu