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Core CIF Dictionary version 2.3




Category: atom_site

Data type: char

Must appear in a looped list containing '_atom_site_label'


A 'disordered methyl assembly with groups 1 and 2'
B 'disordered sites related by a mirror'
S 'disordered sites independent of symmetry'


A code which identifies a cluster of atoms that show long range positional disorder but are locally ordered. Within each such cluster of atoms, _atom_site_disorder_group is used to identify the sites that are simultaneously occupied. This field is only needed if there is more than one cluster of disordered atoms showing independent local order.

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