Zeitschrift für Kristallographie - Crystalline Materials
Editor-in-Chief: Pöttgen, Rainer
Ed. by Antipov, Evgeny / Bismayer, Ulrich / Boldyreva, Elena V. / Huppertz, Hubert / Petrícek, Václav / Tiekink, E. R. T.
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Contribution to the crystal chemistry of rare earth chalcogenides. III. The crystal structure and twinning of SmS1.9
Citation Information: Zeitschrift für Kristallographie - Crystalline Materials. Volume 215, Issue 6, Pages 346–351, ISSN (Online) 2196-7105, ISSN (Print) 2194-4946, DOI: 10.1524/zkri.2000.215.6.346, September 2009
- Published Online:
The structure of samarium disulfide SmS1.9, space group P42/n; lattice constants a = 19.717(2)Å ; c = 15.928(1) Å has been determined and refined by LS method to R = 0.0345; Rw = 0.0419. The structure is a tenfold superstructure from the structure type ZrSSi. [S2]2– dumbbells with interatomic distances 2.146(1)Å between S atoms were observed in the structure. Fully ordered vacancies and orientation of the [S2]2- dumbbells are responsible for the formation of the superstructure. The investigated sample was twinned by the reticular merohedral law, the twin symmetry is 4/mm´m´, the twinning symmetry elements are (310) and (120) mirror planes and the twin index is n=5.
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