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)


Index

Core dictionary version 3.3.0

_space_group.crystal_system

Name:
_space_group.crystal_system

Alias:
_space_group_crystal_system

Definition:

   
    The name of the system of geometric crystal classes of space
    groups (crystal system) to which the space group belongs.
    Note that rhombohedral space groups belong to the
    trigonal system.

Type: Text


The data value must be one of the following:


triclinic

monoclinic

orthorhombic

tetragonal

trigonal

hexagonal

cubic

Category:
space_group








































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