Centrosymmetry vs noncentrosymmetry in La2Ga0.33SbS5 and Ce4GaSbS9 based on the interesting size effects of lanthanides: Syntheses, crystal structures, and optical properties
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- 作者：Hua-Jun Zhaoa ; b ; cszzl772002@yeah.net" class="auth_mail" title="E-mail the corresponding author
- 关键词：Antimony chalcogenides ; Crystal structure ; Optical property
- 刊名：Journal of Solid State Chemistry
- 出版年：2016
- 出版时间：May 2016
- 年：2016
- 卷：237
- 期：Complete
- 页码：99-104
- 全文大小：2551 K
文摘
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Two new quaternary sulfides La2Ga0.33SbS5 and Ce4GaSbS9 have been prepared by solid-state reaction.
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Ce4GaSbS9 crystallizes in RE4GaSbS9 (RE=Pr, Nd, Sm, Gd–Ho) structure type, while La2Ga0.33SbS5 belongs to the family of La4FeSb2S10-related structure.
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The optical gap of 1.76 eV for La2Ga0.33SbS5 was deduced from UV/Vis reflectance spectroscopy.