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Index

Magnetic structures (magCIF) version 0.9.8

_space_group_magn.point_group_name

Name:
_space_group_magn.point_group_name

Definition:

   
     Any magnetic point group (MPG) can be constructed by starting
     with a non-magnetic point group P, and then by adding a time-reversal
     component to some or all or none of its elements. For a
     type-1 MPG, M = P, there are no time-reversed elements. For a
     type-2 MPG, M = P + P1', there is both a time-reversed and a
     non-time-reversed  copy of each element in P. For a type-3 MPG,
     M = Q + (P - Q)1', there is a subgroup Q of P of index 2 whose
     elements are not time reversed, whereas the remaining elements
     in P-Q are time reversed. For a type-1 MPG, the symbol is identical
     with the symbol for the non-magnetic point group P. For a type-2 MPG,
     the symbol is the symbol for P followed by the symbol 1'. For a
     type-3 MPG, the symbol is that of P with a prime added to each
     time-reversed generator.

     Analogous tags: symCIF:_space_group.point_group_H-M

     Ref: 'Magnetic Group Tables' by D.B. Litvin at
     http://www.iucr.org/publ/978-0-9553602-2-0 

Examples:

1
"1 1'"
-1
"-1 1'"
-1'
'4 m m'
"4' m' m"
"4' m m'"

Type: Text

Category:
space_group_magn