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Crystal structures of the compounds R3CuSiS7(R = Ce, Pr, Nd, Sm, Tb, Dy and Er) and R3CuSiSe7(R = La, Ce, Pr, Nd, Sm, Gd, Tb and Dy)

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
431
Identifiers
DOI: 10.1016/j.jallcom.2006.05.090
Keywords
  • Chalcogenides
  • Rare Earth Compounds
  • Cu Compounds
  • Si Compounds
  • S Compounds
  • Se Compounds
  • Crystal Structure
  • X-Ray Single Crystal Diffraction
  • X-Ray Powder Diffraction

Abstract

Abstract The crystal structures of the compounds R 3CuSiS 7 (R = Ce, Pr, Nd, Sm, Tb, Dy and Er) and R 3CuSiSe 7 (R = La, Ce, Pr, Nd, Sm, Gd, Tb and Dy) (La 3CuSiS 7 structure type, space group P6 3, Pearson symbol hP24) were determined by means of X-ray single crystal and powder diffraction. The R atoms are surrounded by distorted trigonal prisms. A triangular surrounding exists for the Cu atoms. A tetrahedral surrounding exists for the Si atoms. The S(Se)1 and S(Se)3 atoms are surrounded by tetrahedra also. Four cations surround every S(Se)2 atom.

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