Synthesis and characterization of a new quaternary selenide Sr3GeSb2Se8

Ching Yi Yu, Ming Fang Wang, Ming Yang Chung, Shyue Ming Jang, Jih Chen Huang, Chi-Shen Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A new quaternary selenide Sr3GeSb2Se8 has been synthesized at 750 °C from pure elements in a stoichiometric ratio under vacuum. The product as-synthesized is characterized by single-crystal X-ray diffraction, diffuse reflectance spectroscopy, and thermoanalysis. The title compound crystallizes in the orthorhombic space group Pnma with a = 12.633(4) Å, b = 4.301(1) Å, c = 28.693(7) Å, V = 1558.8(8) Å3, Z = 4, R1/wR2 = 0.0582/0.1221, and GOF = 1.077. The structure of Sr3GeSb2Se8 features a new structural type that consists of one-dimensional chains of vertex-sharing tetrahedra 1[MSe3] (M = Ge/Sb) and fused double chains of edge-shared square pyramids 1[M2 Se5], which are held together by Sr2+ ions. A band gap of 0.75 eV for Sr3GeSb2Se8 was derived from its diffuse reflectance spectrum.

Original languageEnglish
Pages (from-to)1145-1149
Number of pages5
JournalSolid State Sciences
Volume10
Issue number9
DOIs
StatePublished - 1 Sep 2008

Keywords

  • Antimony
  • Crystal structure
  • Germanium
  • Selenium
  • Semiconductor
  • Solid-state synthesis

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