Raman and infrared spectra of doped La8+xSr2-y(SiO4)6O2+δ compounds compared to the ab initio-obtained spectroscopic characteristics of fully stoichiometric La8Sr2(SiO4)6O2

被引：6
|
作者：
Smirnov, M. [1 ]
Sukhomlinov, S. [1 ]
Mirgorodsky, A. [2 ]
Masson, O. [2 ]
Bechade, E. [2 ]
Colas, M. [2 ]
Merle-Mejean, T. [2 ]
Julien, I. [2 ]
Thomas, P. [2 ]
机构：
[1] St Petersburg State Univ, Dept Phys, Petrodvorets 198504, Russia
[2] Univ Limoges, Sci Procedes Ceram & Traitements Surfaces UMR 663, CNRS, F-87060 Limoges, France
来源：
JOURNAL OF RAMAN SPECTROSCOPY | 2010年 / 41卷 / 12期
关键词：
oxide ion conductivity; lanthanum silicate; infrared spectrum; Raman spectrum; computer modeling; density functional theory; OXIDE-ION CONDUCTIVITY; POWDER NEUTRON-DIFFRACTION; ELECTRICAL-PROPERTIES; ELECTRONIC TRANSPORT; INTERSTITIAL OXYGEN; SI-29; NMR; APATITE; LA9.33SI6O26; ENHANCEMENT; CONDUCTORS;
D O I：
10.1002/jrs.2626
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Vibrational spectroscopy data were used to gain insight into the possible locations of extra oxygen ions introduced into La8+xSr2-y(SiO4)(6)O2+delta compounds to raise their ionic conductivity. Perturbations observed in the Raman and infrared spectra of these compounds with increasing delta were explained by using the at, initio calculation results for the fully stoichiometric (x = y = delta = 0) lattice. This allowed the inference that the extra oxygen ions are incorporated into La-O tunnel-like fragments inherent in the studied structures. Copyright (C) 2010 John Wiley & Sons, Ltd.
引用
收藏
页码：1700 / 1707
页数：8
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