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)
CIF_CORE_HEAD > STRUCTURE > ATOM > ATOM_SITE

Index

Core dictionary version 3.3.0

_atom_site.fract_y_su

Name:
_atom_site.fract_y_su

Aliases:
_atom_site_fract_y_su
_atom_site.fract_y_esd

Definition:

   
     Standard uncertainty value of the atom site coordinates
     as fractions of the cell length values.

Type: Real

Units: none

Category:
atom_site








































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