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Core CIF Dictionary version 2.3




Category: symmetry

Data type: char

Related item: '_space_group_name_H-M_alt'
Related function: replace


'P 1 21/m 1'
'P 2/n 2/n 2/n (origin at -1)'
'R -3 2/m'


Hermann-Mauguin space-group symbol. Note that the H-M symbol does not necessarily contain complete information about the symmetry and the space-group origin. If used always supply the FULL symbol from International Tables for Crystallography, Vol. A (1987) and indicate the origin and the setting if it is not implicit. If there is any doubt that the equivalent positions can be uniquely deduced from this symbol specify the _symmetry_equiv_pos_as_xyz or *_Hall data items as well. Leave spaces between symbols referring to different axes.

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