Crystal structure variations in the series SrLnCuS 3 (Ln = La, Pr, Sm, Gd, Er and Lu)

The crystal structures of the complex sulfides SrLnCuS (Ln = Sm, Gd, Er and Lu) have been determined and refined using powder X-ray diffraction. The crystals are found to be orthorhombic, with the structure type changing consecutively in the order BaLaCuS → Eu CuS → KZrCuS as the Ln ionic radius dec...

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Published inActa crystallographica. Section C, Structural chemistry Vol. 75; no. Pt 5; p. 584
Main Authors Ruseikina, Anna V, Solovyov, Leonid A, Grigoriev, Maksim V, Andreev, Oleg V
Format Journal Article
LanguageEnglish
Published England 01.05.2019
Subjects
crystallochemical contraction
crystal structure
sulfides of rare earth elements
derivative difference minimization method
SrLnCuS3
powder diffraction
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Summary:The crystal structures of the complex sulfides SrLnCuS (Ln = Sm, Gd, Er and Lu) have been determined and refined using powder X-ray diffraction. The crystals are found to be orthorhombic, with the structure type changing consecutively in the order BaLaCuS → Eu CuS → KZrCuS as the Ln ionic radius decreases in the order La/Pr → Sm/Gd → Er/Lu. Variations of the structure parameters along the series of compounds studied are analyzed, and an effect caused by crystallochemical contraction on the stabilization of the respective structure types is demonstrated.
ISSN:2053-2296
DOI:10.1107/S2053229619004984