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 > VALENCE > VALENCE_PARAM

Index

Core dictionary version 3.3.0

_valence_param.atom_1

Name:
_valence_param.atom_1

Alias:
_valence_param_atom_1

Definition:

   
    The atom type symbol for atom 1 forming a bond whose
    bond-valence parameters are given in this category.

Type: Word

Category:
valence_param








































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