Syntheses and structures of the quaternary alkali-metal bismuth coinage-metal chalcogenides K3Bi5Cu2S10, CsBi2CuS4, RbBi2.66CuSe5, and CsBiAg2S3

Qiang Huang Fu Qiang Huang, K. Mitchell, J. A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The four compounds K3Bi5Cu2S10, CsBi2CuS4, RbBi2.66CuSe5, and CsBiAg2S3 were synthesized at 873 K by reactions of the elements in the reactive fluxes of A2Q3 (A = K, Rb, Cs; Q = S, Se). All crystallographic data were collected at 153 K. K3Bi5Cu2S10 crystallizes in the Rb3Bi5Cu2S10 structure type in space group Pnnm of the orthorhombic system with two formula units in a cell of dimensions a = 14.173(2) Å, b = 17.690(2) Å, c = 4.0362(5) Å; CsBi2CuS4 crystallizes as a racemic twin in space group Cmc21 of the orthorhombic system with four formula units in a cell of dimensions a = 4.0730(6) Å, b = 14.212(2) Å, c = 14.568(2) Å; RbBi2.66CuSe5 crystallizes in a new structure type in space group Cmcm of the orthorhombic system with four formula units in a cell of dimensions a = 4.1961(9) Å, b = 14.420(3) Å, c = 18.266(4) Å; CsBiAg2S3 crystallizes in a new structure type in space group P21/c of the monoclinic system with four formula units in a cell of dimensions a = 13.3523(14) Å, b = 8.1052(8) Å, c = 6.9162(7) Å, β = 99.766(2)°. K3Bi5Cu2S10, CsBi2CuS4, and RbBi2.66CuSe5 are related; they are all tunnel structures with the A atoms located in tunnels formed by BiQ6 octahedra and CuQ4 tetrahedra. CsBiAg2S3 is composed of two-dimensional 2[BiAg2S31-] layers separated by the Cs atoms. The 2[BiAg2S31-] layer is built from BiS6 octahedra, linear AgS2 groups, and AgS4 tetrahedra.

Original languageEnglish (US)
Pages (from-to)84-90
Number of pages7
JournalJournal of Alloys and Compounds
Volume325
Issue number1-2
DOIs
StatePublished - Jul 26 2001

Keywords

  • Bismuth
  • Chalcogenide
  • Crystal structure
  • Solid-state compound
  • Synthesis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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