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 > MODEL

Index

Core dictionary version 3.3.0

Category MODEL

Name:
'MODEL'

Parent category:
CIF_CORE_HEAD

Definition:

   
    Data items in the MODEL family of categories specify data for the
    crystal structure postulated and modelled from the atomic coordinates
    derived and refined from the diffraction information. The structural
    model is described principally in terms of the geometry of 'connected'
    atom sites and the crystal symmetry in which they reside.

Category is of type Set








































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