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Site Symmetry in Permutation — Inversion Symmetry Groups of Nonrigid Crystals

  • Robert A. Evarestov
  • Vyacheslav P. Smirnov
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 108)

Abstract

A crystal is called nonrigid if some of its nuclei show motions relative to the crystal as a whole differing from small vibrations, for example, rotations, inversion motions, or large amplitude vibrations. There are a great number of such crystals [10.1]. For example, molecules in plastic crystals show free or hindered rotations. These rotations can be observed, for instance, in NMR spectra: one observes line narrowing when the molecules start to rotate.

Keywords

Symmetry Group Initial Configuration Semidirect Product Site Symmetry Invariant Subgroup 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 10.1
    G.N. Parsonage, L.A. Stavely: Disorder in Crystals (Clarendon, Oxford 1978)Google Scholar
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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Robert A. Evarestov
    • 1
  • Vyacheslav P. Smirnov
    • 2
  1. 1.Department of ChemistrySt. Petersburg University St. PeterhoffSt. PetersburgRussia
  2. 2.Department of Theoretical PhysicsInstitute of Fine Mechanics and OpticsSt. PetersburgRussia

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