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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_aniso.ratio
Name:_atom_site_aniso.ratio
Aliases:
_atom_site_aniso_ratio
_atom_site_anisotrop.ratio
_atom_site.aniso_ratio
Definition:
The ratio of the maximum to minimum eigenvalues of the atomic
displacement parameter matrix. In visual representation, the ratio
of major to minor axis lengths of the displacement ellipsoids.
Type: Real
Units: none
The permitted range is 1.0 → infinity
Category:
atom_site_aniso
