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 > EXPTL > CHEMICAL > CHEMICAL_CONN_ATOM

Index

Core dictionary version 3.3.0

_chemical_conn_atom.NH

Name:
_chemical_conn_atom.NH

Alias:
_chemical_conn_atom_NH

Definition:

   
    The total number of hydrogen atoms attached to this atom,
    regardless of whether they are included in the refinement or
    the ATOM_SITE list. This number will be the same as
    _atom_site.attached_hydrogens only if none of the hydrogen
    atoms appear in the ATOM_SITE list.

Type: Integer

Units: none


The permitted range is 0 → infinity

Category:
chemical_conn_atom








































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