_space_group_symop_magn_ssg_operation.algebraic

Name:
_space_group_symop_magn_ssg_operation.algebraic

Definition:

   
     A parsable string giving one of the symmetry operations of the
     magnetic  superspace group in algebraic form.  The analogy
     between parsable labels for magnetic and non-magnetic symmetry
     operations is perfect except for the fact that a magnetic symop
     label ends with an additional piece of information ("-1" or "+1")
     indicating that the operation is or is not time-reversed,
     respectively. This tag is intended for use with the BNS
     description of the magnetic basic cell.

     Analogous tags: msCIF:_space_group_symop.ssg_operation_algebraic

Examples:

x1,x2,x3,x4,x5,x6,+1 the identity element in (3+3)D.

x1,x2,x3,x4+1/2,-1 a superspace anti-centering translation based on a simple 180-degree phase shift of a single modulation vector

x1+1/2,x2+1/2,-x3,-x4,-1 a time-reversed n-glide perpendicular to a z-axis modulation

x1-x2,x1,x3+1/3,x4-1/6,x5,+1 a non-time-reversed 6_2 screw axis with phase shift along a pair of z-axis modulations

Type: Text

Category:
space_group_symop_magn_ssg_operation

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Crystallographic Information Framework

Magnetic structures (magCIF) version 0.9.8

_space_group_symop_magn_ssg_operation.algebraic

International Tables for Crystallography

Volume G: Definition and exchange of crystallographic data

Edited by S. R. Hall and B. McMahon

IUCrData