Core dictionary (coreCIF)

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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 Tables for Crystallography (2026). Vol. G. Early view chapter
https://doi.org/10.1107/97809553602060001011

Chapter 4.2 Core dictionary (coreCIF)

Name:
_space_group.multiplicity

Definition:

   
    Number of unique symmetry operations in the space group.

Type: Integer

Units: none

The permitted range is 1 → 192

Evaluation method:

    n =  0

    Loop  s  as  space_group_symop  n +=  1

     _space_group.multiplicity  =   n

Category:
space_group

International Tables for Crystallography (2026). Vol. G. Chapter 4.2
https://doi.org/10.1107/97809553602060001011