              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 _symmetry.space_group_name_Hall data items as well. Leave\
               spaces between symbols referring to different axes.