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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_atom.NCA
Name:_chemical_conn_atom.NCA
Alias:
_chemical_conn_atom_NCA
Definition:
The number of connected atoms excluding terminal hydrogen atoms.
Type: Integer
Units: none
The permitted range is 0 → infinity
Category:
chemical_conn_atom
