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A concatenated series of single-letter codes which indicate the
refinement restraints or constraints applied to this site. This
item should not be used. It has been replaced by
_atom_site.refinement_flags_posn, *_adp and *_occupancy. It is
retained in this dictionary only to provide compatibility with
old CIFs.
| Item Value | Description |
|---|---|
| n.a. | no refinement constraints |
| S | special-position constraint on site |
| G | rigid-group refinement of site |
| R | riding-atom site attached to non-riding atom |
| D | distance or angle restraint on site |
| T | thermal displacement constraints |
| U | Uiso or Uij restraint (rigid bond) |
| P | partial occupancy constraint |
| Alias Name | Dictionary | Version |
|---|---|---|
| _atom_site_refinement_flags | cif_core.dic | 2.3 |
| Related Item | Related Function |
|---|---|
| _atom_site.refinement_flags_posn | replaces |
| _atom_site.refinement_flags_adp | replaces |
| _atom_site.refinement_flags_occupancy | replaces |