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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
_chemical_conn_bond.atom_1
Name:_chemical_conn_bond.atom_1
Aliases:
_chemical_conn_bond_atom_1
_chem_comp_bond.atom_id_1
Definition:
The index identifier of the first atom in a bond connecting two atom sites.
These identifiers must match with chemical sequence numbers specified as
_chemical_conn_atom.number values. These link the
bond connection to the chemical numbering and atom sites.
Type: Integer
Units: none
The permitted range is 1 → infinity
Category:
chemical_conn_bond
