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Item _space_group.name_H-M_ref

Description

              The Short International Hermann-Mauguin space group symbol as
               defined in Section 2.3 and given as the first item of each
               Space Group Table in Section 7 of International Tables
               for Crystallography Vol.A (1995). 
               Each component of the space group name is separated by a 
               space or an underscore.  The use of space is strongly
               recommended.  The underscore is only retained because it
               was used in earlier archived files.  It should not be 
               used in new CIFs. 
               Subscripts should appear without special symbols. Bars
               should be given as negative signs before the numbers to which
               they apply.  The Short International Hermann-Mauguin symbol
               determines the space group type uniquely.  However, the space
               group type is better described using the *.IT_number or
               *.name_Schoenflies.  The Short International Hermann-Mauguin
               symbol contains no information on the choice of basis or
               origin. To define the setting uniquely use *.name_Hall, list
               the symmetry operations or generators, or give the
               transformation that relates the setting to the reference
               setting defined in this dictionary under *.reference_setting.
               _space_group.name_H-M_alt may be used to give the Hermann-
               Mauguin symbol corresponding to the setting used.

Category

Item Examples

Example 1:

P 21/c

Example 2:

P m n a

Example 3:

P -1

Example 4:

F m -3 m

Example 5:

P 63/m m m

Mandatory Code

Data Type Code

Enumeration Values

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