Index

Multi-block CIF dictionary version 1.1.0

Category SPACE_GROUP

Parent category:
EXPTL

Definition:

   
    Data items in the SPACE_GROUP category are used to specify space-group
    information about the crystal used in the diffraction measurements.

    Space-group types are identified by their number as listed in
    International Tables for Crystallography Volume A, or by their
    Schoenflies symbol. Specific settings of the space groups can
    be identified by their Hall symbol, by specifying their
    symmetry operations or generators, or by giving the
    transformation that relates the specific setting to the
    reference setting based on International Tables Volume A and
    stored in the core CIF dictionary.

    The commonly used Hermann-Mauguin symbol determines the
    space-group type uniquely, but several different Hermann-Mauguin
    symbols may refer to the same space-group type. A
    Hermann-Mauguin symbol contains information on the choice of
    the basis, but not on the choice of origin.

    Ref: International Tables for Crystallography (2016). Volume A,
     Space-group symmetry, edited by M. I. Aroyo, 6th ed.
     Chichester: John Wiley & Sons.

Category is of type Set