Crystallographic Information Framework

[CIF logo]


Modulated and composite structures dictionary (msCIF) version 1.0.1


'_geom_bond_site_ssg_symmetry_1' '_geom_bond_site_ssg_symmetry_2'


   The symmetry code of each atom site as the symmetry operation
   number 'n' and the higher-dimensional translation ''.
   These numbers are combined to form the code 'n' or The character string is composed as follows:
   'n' refers to the symmetry operation that is applied to the
   superspace coordinates. It must match a number given in
   _space_group_symop_ssg_id. '' refer to the translations
   that are subsequently applied to the symmetry-transformed
   coordinates to generate the atom used in calculating the bond.
   These translations (t1, are related to ( by the
   relations m1=5+t1, ..., mp=5+tp. By adding 5 to the translations,
   the use of negative numbers is avoided. The number 'p' must agree
   with (_cell_modulation_dimension + 3). If there are no cell
   translations, the translation number may be omitted. If no
   symmetry operations or translations are applicable then a single
   full stop '.' is used.


. no symmetry or translation to site
4 4th symmetry operation applied
7_6455 7th symmetry position; +a on x, -b on y

Appears in list containing _geom_bond_atom_site_label_

Type: char

Category: geom_bond