Index

Magnetic structures (magCIF) version 0.9.8

_space_group_magn.ssg_name

Definition:

   
     The Belov-Neronova-Smirnova (BNS) symbol for a magnetic
     superspace group (MSSG) is based on the symbol of the
     non-magnetic superspace group (SSG) obtained by eliminating all
     time-reversed operators from the group, as listed in the ISO(3+d)D
     tables of Stokes and Campbell. If the magnetic basic space group
     (MBSG) is of type-1 or type-3 (also known as type-3a), its BNS symbol
     merely replaces that of the basic space-group (BSG).  If the MBSG
     is of type-2 or type-4  (also known as type-3b), an additional
     phase-shift symbol associated with the time-reversal generator is added
     to each modulation vector.  If the MBSG is of type-4, the BNS
     symbol of the MSSG is further modified to explicitly show the
     time-reversal generator (1') at the end, and the anti-centering
     subscript is moved from the lattice symbol to the 1' so as to
     clearly indicate the fractional external-space translation of
     this generator.
     The examples are based on SSG 47.1.9.3 Pmmm(0,0,g)ss0 in (3+1)D.

     Analogous tags: msCIF:_space_group.ssg_name

     Ref: ISO-MAG tables of H.T. Stokes and B.J. Campbell at
     http://iso.byu.edu. ISO(3+d)D tables of H.T. Stokes and B.J.
     Campbell at http://iso.byu.edu.

Type: Text

Category: space_group_magn