Index

Modulated structures dictionary (msCIF) version 3.2.1

_space_group.ssg_name_WJJ

Definition:

   

      Superspace-group symbol as given by de Wolff, Janssen & Janner
      (1981). Valid only for one-dimensional modulated structures.
      The symbol is divided into three parts separated by colons ':':
      the superspace lattice symbol, the Hermann-Mauguin space-group
      symbol of the reference structure 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 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: Wolff, P. M. de, Janssen, T. & Janner, A. (1981).
             Acta Cryst. A37, 625-636.
             The superspace groups for incommensurate crystal 
             structures with a one-dimensional modulation

Type: Text

Category:
space_group