標題: | Synthesis and characterization of a new quaternary selenide Sr(3)GeSb(2)Se(8) |
作者: | Yu, Ching-Yi Wang, Ming-Fang Chung, Ming-Yang Jang, Shyue-Ming Huang, Jih-Chen Lee, Chi-Shen 應用化學系 應用化學系分子科學碩博班 Department of Applied Chemistry Institute of Molecular science |
關鍵字: | crystal structure;germanium;antimony;selenium;solid-state synthesis;semiconductor |
公開日期: | 1-Sep-2008 |
摘要: | A new quaternary selenide Sr(3)GeSb(2)Se(8) has been synthesized at 750 degrees 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) angstrom, b = 4.301(1) angstrom, c = 28.693(7) angstrom, V = 1558.8(8) angstrom(3), Z = 4, R(1)/wR(2) = 0.0582/0.1221, and GOF = 1.077. The structure of Sr(3)GeSb(2)Se(8) features a new structural type that consists of one-dimensional chains of vertex-sharing tetrahedra (1)(infinity)[MSe(3)] (M = Ge/Sb) and fused double chains of edge-shared square pyramids (1)(infinity)[M(2)Se(5)], which are held together by Sr(2+) ions. A band gap of 0.75 eV for Sr(3)GeSb(2)Se(8) was derived from its diffuse reflectance spectrum. (C) 2007 Elsevier Masson SAS. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.solidstatesciences.2007.12.010 http://hdl.handle.net/11536/8426 |
ISSN: | 1293-2558 |
DOI: | 10.1016/j.solidstatesciences.2007.12.010 |
期刊: | SOLID STATE SCIENCES |
Volume: | 10 |
Issue: | 9 |
起始頁: | 1145 |
結束頁: | 1149 |
Appears in Collections: | Articles |
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