skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Synthesis and structure of new perovskite phase in the La-Ti-Al-O system

Abstract

In this paper the authors report the synthesis of a new phase in the La-Ti-Al-O system. A starting composition La{sub 2}TiAlO{sub 6.5} and synthesis conditions of 1400 C under H{sub 2}/Ar (5%/95%) resulted in a perovskite with a monoclinic (I2/a; a = 7.686, b = 5.435, c = 5.424 {angstrom}, {beta} = 90.20{degree}) cell. Although it was necessary to synthesize this material under reducing conditions, once prepared it was stable to subsequent oxidation at high temperatures in air. Structure refinement using neutron diffraction suggests the possible incorporation of a small amount of La on the small cation sites along with a La deficiency on the large cation sites, such that the composition may be written as La{sub 0.83} (La{sub 0.07}Al{sub 0.465}Ti{sub 0.465})O{sub 2.9}.

Authors:
 [1];  [2]
  1. Univ. of Surrey, Guildford (United Kingdom)|[Univ. of St. Andrews, Fife (United Kingdom). School of Chemistry
  2. Univ. of St. Andrews, Fife (United Kingdom). School of Chemistry
Publication Date:
OSTI Identifier:
696677
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 146; Journal Issue: 2; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; SYNTHESIS; LANTHANUM OXIDES; TITANIUM OXIDES; ALUMINIUM OXIDES; PEROVSKITE; X-RAY DIFFRACTION; NEUTRON DIFFRACTION; LATTICE PARAMETERS; EXPERIMENTAL DATA

Citation Formats

Slater, P.R., and Irvine, J.T.S. Synthesis and structure of new perovskite phase in the La-Ti-Al-O system. United States: N. p., 1999. Web. doi:10.1006/jssc.1999.8388.
Slater, P.R., & Irvine, J.T.S. Synthesis and structure of new perovskite phase in the La-Ti-Al-O system. United States. doi:10.1006/jssc.1999.8388.
Slater, P.R., and Irvine, J.T.S. Wed . "Synthesis and structure of new perovskite phase in the La-Ti-Al-O system". United States. doi:10.1006/jssc.1999.8388.
@article{osti_696677,
title = {Synthesis and structure of new perovskite phase in the La-Ti-Al-O system},
author = {Slater, P.R. and Irvine, J.T.S.},
abstractNote = {In this paper the authors report the synthesis of a new phase in the La-Ti-Al-O system. A starting composition La{sub 2}TiAlO{sub 6.5} and synthesis conditions of 1400 C under H{sub 2}/Ar (5%/95%) resulted in a perovskite with a monoclinic (I2/a; a = 7.686, b = 5.435, c = 5.424 {angstrom}, {beta} = 90.20{degree}) cell. Although it was necessary to synthesize this material under reducing conditions, once prepared it was stable to subsequent oxidation at high temperatures in air. Structure refinement using neutron diffraction suggests the possible incorporation of a small amount of La on the small cation sites along with a La deficiency on the large cation sites, such that the composition may be written as La{sub 0.83} (La{sub 0.07}Al{sub 0.465}Ti{sub 0.465})O{sub 2.9}.},
doi = {10.1006/jssc.1999.8388},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 146,
place = {United States},
year = {1999},
month = {9}
}