Index

Modulated and composite structures dictionary (msCIF) version 1.0.1

_space_group_ssg_name_IT

Definition:

   Superspace-group symbol as given in International Tables for
   Crystallography, Vol. C (2004). 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.

   Ref: International Tables for Crystallography (2004). Vol. C,
        Chapter 9.8. Dordrecht: Kluwer Academic Publishers.

Type: char

Category: space_group