New process of preparation, X-ray characterisation, structure and vibrational studies of a solid solution LiTiOAs1-xPxO4 (0≤x≤1)

被引：12

作者：

Chakir, M ^{[1
]}

El Jazouli, A

Chaminade, JP

Bouree, F

de Waal, D

机构：

[1] Univ Hassan II, Lab Chim Mat Solides, Fac Sci Ben MSik, Casablanca, Morocco

[2] CNRS, Inst Chim Matiere Condensee Bordeaux, F-33608 Pessac, France

[3] CEA Saclay, CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[4] Univ Pretoria, Dept Chem, ZA-0002 Pretoria, South Africa

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 01期

关键词：

structure; powder diffraction; X-rays; neutrons; Raman; infrared;

D O I：

10.1016/j.jssc.2005.09.047

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

LiTiOAs1-xPxO4 (0 <= x <= 1) compounds have been prepared using solutions of Li, Ti, As and P elements as starting products. Selected compositions have been investigated by powder X-ray or neutrons diffraction analysis, Raman and infrared spectroscopy. The structure of LiTiOAs1-xPxO4 (X = 0, 0.5 and 1) samples determined by Rietveld analysis is orthorhombic with Pmna space group. It is formed by a 3D network of TiO6 octahedra and XO4 (X = As1-xPx) tetrahedra where octahedral cavities are occupied by lithium atoms. TiO6 octahedra are linked together by corners and form infinite chains along a-axis. Ti atoms are displaced from the centre of octahedral units in alternating short (1.700-1.709 angstrom) and long (2.301-2.275 angstrom) Ti-O bonds. Raman and infrared studies confirm the existence of Ti-O-Ti chains. Thermal stability of LiTiOASO(4) has been reported. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：18 / 28

页数：11

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