title: Transformational space-group symbols.
abstract: Ambiguities present in space-group construction from the Hermann-Mauguin (H-M) symbols enforce the use of other space-group designations or H-M symbol modifications. Therefore, a transformational space-group symbol (TSG) composed of the well defined standard space-group identifier, an axis-system transformation and origin shift is proposed as a symbol of any space-group description. The first description given in International Tables for Crystallography [(1983), Vol. A, Space-Group Symmetry, edited by Th. Hahn. Dordrecht: Reidel (ITA83)] or the second one for space groups with two origins is suggested here as a reference description. For standard descriptions based on the ITA generators and compiled list of the TSG symbols, all conventional space-group settings listed in ITA83 can be reconstructed.
authors.affiliation: Institute of Materials Science, University of Silesia, Bankowa 12, 40-007 Poland. kstroz@us.edu.pl
authors.forename: Kazimierz
authors.initials: K
authors.lastname: Stróz
mesh_terms: D018360:Crystallography, X-Ray / Q000379:methods*