Index

Modulated structures dictionary (msCIF) version 3.2.1

_space_group.ssg_name_IT

Definition:

   

      Superspace-group symbol as given in International Tables for
      Crystallography, Vol. C (2006). Valid only for one-dimensional
      modulated structures. The symbol is divided into three parts:
      the Hermann-Mauguin space-group symbol of the reference
      structure, the modulation wave vector  and the phase shift
      (or internal translation) associated with each component of
      the space group. Each component of the space-group name is
      separated by a space. Subscripts should appear without special
      symbols and bars should be given as negative signs. The
      components of the modulation wave vector (in parentheses) and
      the phase shifts are also separated by a space. For composites
      described in a single data block, the superspace group
      describes the symmetry of the whole structure. The symmetry
      of each subsystem can be derived using the appropriate W
      matrices.
      Reference: International Tables for Crystallography (2006). Vol. C,
             Chapter 9.8. John Wiley & Sons, Ltd.
             Incommensurate and commensurate modulated structures

Type: Text

Category:
space_group