NONSYM

SYMMETRY TOOLS

Search and analysis of non-crystallographic symmetry.

This (experimental) routine attempts to identify symmetry relations between crystallographically independent molecules.

In general there will be three outcomes of a NONSYM analysis:

  1. A symmetry direction is found compatible with the translation lattice. In such a case, ADDSYM should have indicated what the read space group will be.

  2. A symmetry direction is found that is not compatible with the translation lattice, i.e with a non-zero angle with all translation vectors in the lattice, and thus only local.
    A possible consequence could be disorder/twinning.

  3. No satisfactory local or glabal (pseudo) symmetry direction.

Instructions

The NONSYM feature is invoked either with a left-button-click on NEWSYM or from the keyboard:

CALC NEWSYM