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

Title: Structural and thermal studies of H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7}, a protonated layered perovskite

Abstract

We have synthesised the new protonated layered perovskite H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7} which is related to the Ruddlesden-Popper family. This compound is obtained by ionic exchange starting from Li{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7} maintained in dilute HNO{sub 3} at 60 deg. C. Thermal X-ray diffraction and DTA/TGA revealed interesting dehydration properties with formation of a layered anhydrous phase leading at higher temperature (1550 deg. C) to La{sub 1/3}TaO{sub 3}. This latter compound exhibits the original lanthanum ordering expected similarly to that of the Li form, while at 900 deg. C a metastable form, presenting a disordered La distribution, is observed.

Authors:
 [1];  [1];  [1]
  1. Laboratoire des Oxydes et Fluorures (UMR 6010 CNRS), Institut de Recherche en Ingenierie Moleculaire et Materiaux Fonctionnels (FR 2575 CNRS), Universite du Maine, Avenue O. Messiaen, 72085 Le Mans Cedex 9 (France)
Publication Date:
OSTI Identifier:
20891666
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 41; Journal Issue: 4; Other Information: DOI: 10.1016/j.materresbull.2005.10.003; PII: S0025-5408(05)00378-8; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DEFECTS; DEHYDRATION; DIFFERENTIAL THERMAL ANALYSIS; ION EXCHANGE; LANTHANUM; LANTHANUM OXIDES; MICROSTRUCTURE; NITRIC ACID; PEROVSKITE; PHASE TRANSFORMATIONS; TANTALUM OXIDES; THERMAL GRAVIMETRIC ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Le Berre, F., Crosnier-Lopez, M.P., and Fourquet, J.L. Structural and thermal studies of H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7}, a protonated layered perovskite. United States: N. p., 2006. Web. doi:10.1016/j.materresbull.2005.10.003.
Le Berre, F., Crosnier-Lopez, M.P., & Fourquet, J.L. Structural and thermal studies of H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7}, a protonated layered perovskite. United States. doi:10.1016/j.materresbull.2005.10.003.
Le Berre, F., Crosnier-Lopez, M.P., and Fourquet, J.L. Thu . "Structural and thermal studies of H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7}, a protonated layered perovskite". United States. doi:10.1016/j.materresbull.2005.10.003.
@article{osti_20891666,
title = {Structural and thermal studies of H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7}, a protonated layered perovskite},
author = {Le Berre, F. and Crosnier-Lopez, M.P. and Fourquet, J.L.},
abstractNote = {We have synthesised the new protonated layered perovskite H{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7} which is related to the Ruddlesden-Popper family. This compound is obtained by ionic exchange starting from Li{sub 2}La{sub 2/3}Ta{sub 2}O{sub 7} maintained in dilute HNO{sub 3} at 60 deg. C. Thermal X-ray diffraction and DTA/TGA revealed interesting dehydration properties with formation of a layered anhydrous phase leading at higher temperature (1550 deg. C) to La{sub 1/3}TaO{sub 3}. This latter compound exhibits the original lanthanum ordering expected similarly to that of the Li form, while at 900 deg. C a metastable form, presenting a disordered La distribution, is observed.},
doi = {10.1016/j.materresbull.2005.10.003},
journal = {Materials Research Bulletin},
number = 4,
volume = 41,
place = {United States},
year = {Thu Apr 13 00:00:00 EDT 2006},
month = {Thu Apr 13 00:00:00 EDT 2006}
}