International
Tables for Crystallography Volume A Space-group symmetry Edited by Th. Hahn © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. A, ch. 14.3, p. 874
Section 14.3.5. Incorrect space-group assignment^{a}Institut für Mineralogie, Petrologie und Kristallographie, Philipps-Universität, D-35032 Marburg, Germany |
In the literature, some crystal structures are still described within space groups that are only subgroups of the correct symmetry groups. Many such mistakes (but not all of them) could be avoided by simply looking at the lattice complexes (and their descriptive symbols) that correspond to the Wyckoff positions of the different kinds of atoms. Whenever the same (or an analogous) lattice-complex description of a crystal structure is also possible within a supergroup, then the crystal structure has at least that symmetry.
Examples
References
Hobbie, K. & Hoppe, R. (1986). Über Oxorhodate der Alkalimetalle: β-LiRhO_{2}. Z. Anorg. Allg. Chem. 535, 20–30.Pertlik, F. (1988). The compounds KAs_{4}O_{6}X (X = Cl, Br, I) and NH_{4}As_{4}O_{6}X (X = Br, I): Hydrothermal syntheses and structure determinations. Monatsh. Chem. Verw. Teile Anderer Wiss. 119, 451–456.