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International
Tables for Crystallography Volume G Definition and exchange of crystallographic data Edited by J. R. Hester and B. McMahon © International Union of Crystallography 2026 |
International Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001011 Chapter 4.2 Core dictionary (coreCIF) |
Core dictionary version 3.3.0
_atom_site.fract_symmform
Name:_atom_site.fract_symmform
Alias:
_atom_site_fract_symmform
Definition:
A symbolic expression that indicates the symmetry-restricted form of the
components of the positional coordinates of an atom.
Examples:| Dx,Dy,Dz | No symmetry restrictions. |
| Dx,-Dx,0 | y component equal and opposite to x component with z component zero. |
| Dx,0,Dz | y component zero. |
Type: Text
Category:
atom_site
