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Crystal structure of EuLnAgS3 (Ln = Gd and Ho) compounds

  • Physical Methods of Investigation
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Abstract

The crystal structures of the first prepared EuLnAgS3 (Ln = Gd and Ho) compounds, which have two polymorphs, were determined by X-ray powder diffraction. α-EuLnAgS3 phases are isostructural to BaErAgS3 (monoclinic crystal system, space group C2/m): a = 17.3168(10) Å, b = 3.9683(2) Å, c = 8.3174(4) Å, β = 103.94° (EuGdCuS3); a = 17.1729(12) Å, b = 3.9367(3) Å, c = 8.2905(6) Å, β = 103.9° (EuHoCuS3). β-EuLnAgS3 phases belong to the AgBiS2 structure type (cubic crystal system, space group Fm-3m): a = 5.739(2) Å (EuGdCuS3) and a = 5.678 Å (EuHoCuS3). In the α-EuLnAgS3 crystal structure, LnS6 octahedra and AgS5 trigonal bipyramids share edges to form a three-dimensional (3D) structure with channels accommodating Eu2+ ions. A decrease in Ln3+ ionic radius gives rise to the crystal-chemical contraction of the 3D structure.

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Authors and Affiliations

  1. Tyumen State University, Tyumen, 625003, Russia

    A. V. Ruseikina, S. I. Kol’tsov & O. V. Andreev

  2. Tyumen Industrial University, Tyumen, 625000, Russia

    L. A. Pimneva

Authors
  1. A. V. Ruseikina
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  2. S. I. Kol’tsov
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  3. O. V. Andreev
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  4. L. A. Pimneva
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Correspondence to A. V. Ruseikina.

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Original Russian Text © A.V. Ruseikina, S.I. Kol’tsov, O.V. Andreev, L.A. Pimneva, 2017, published in Zhurnal Neorganicheskoi Khimii, 2017, Vol. 62, No. 12, pp. 1629–1634.

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Ruseikina, A.V., Kol’tsov, S.I., Andreev, O.V. et al. Crystal structure of EuLnAgS3 (Ln = Gd and Ho) compounds. Russ. J. Inorg. Chem. 62, 1632–1637 (2017). https://doi.org/10.1134/S003602361712018X

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  • DOI: https://doi.org/10.1134/S003602361712018X

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