Crystallographic Information Framework

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Core dictionary (coreCIF) version 2.4.5




   Space-group symbol defined by Hall.

   Each component of the space-group name is separated by a
   space or an underscore.  The use of a space is strongly
   recommended.  The underscore is only retained because it
   was used in older files.  It should not be
   used in new CIFs.

   _space_group_name_Hall uniquely defines the space group and
   its reference to a particular coordinate system.

   Ref: Hall, S. R. (1981). Acta Cryst. A37, 517-525; erratum
        (1981), A37, 921.
        [See also International Tables for Crystallography,
        Vol. B (2001), Chapter 1.4, Appendix 1.4.2]


'P 2c -2ac' equivalent to Pca21
'-I 4bd 2ab 3' equivalent to Ia-3d

May appear in list containing _space_group_id

Related item: _symmetry_space_group_name_Hall (alternate)

Type: char

Category: space_group