Refined Crystal Structures of SrLnCuS3 (Ln = Er, Yb).

Autor: Ruseikina, A. V., Solov’ev, L. A., Galenko, E. O., Grigor’ev, M. V.
Zdroj: Russian Journal of Inorganic Chemistry; Sep2018, Vol. 63 Issue 9, p1225-1231, 7p
Abstrakt: According to powder X-ray diffraction data, the crystal structures of compounds SrLnCuS3 (Ln = Er, Yb) have been refined by minimizing the derivative difference in the anisotropic approximation for all atoms. Crystals are orthorhombic, space group Cmcm, structure type KZrCuS3: a = 3.93128(3) Å, b = 12.9709(1) Å, c = 10.1161(1) Å, V = 515.843(9) Å3, ρcalc = 5.337 g/cm3, Z = 4, RDDM = 3.73%, RF = 2.06% (SrErCuS3); a = 3.91448(4) Å, b = 12.9554(1) Å, c = 10.0332(1) Å, V = 508.842(8) Å3, ρcalc = 5.487 g/cm3, Z = 4, RDDM = 3.56%, RF = 1.48% (SrYbCuS3). The structure of SrLnCuS3 is described by [LnCuS3] twodimensional layers formed by distorted CuS4 tetrahedra and LnS6 octahedra with Sr2+ ions residing between the layers. The compounds are transparent for IR radiation in the range 3200-1800 cm-1. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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