Synthesis and characterisation of perovskite-type oxynitrides
Synthesis and characterisation of perovskite-type oxynitrides
Rare earth and alkaline earth tantalum oxynitride perovskite-type systems of the stoichiometry A((1-x))Ln(x)TaO((2-x))N((1+x)), where A is an-alkaline earth metal (Ca, Sr and Ba) and Ln, a lanthanide, have been synthesised and characterised using powder X-ray and neutron diffraction. The samples formed were orthorhombically distorted perovskites and crystallised in the space group Pnma. Further analysis of the diffraction data has highlighted the influences that the nature of the cations incorporated and the distribution of the anions have on crystal structure and lattice size. Thermogravimetric analyses have been performed in air and show the onset of decomposition at ca. 400degreesC for all materials. UV-Vis spectroscopic measurements show that these compounds exhibit absorption bands in the visible region, due to inter-band transitions, with positions that can be correlated with structure and composition.
ammonolysis, powder diffraction, oxynitrides, perovskites, ray-powder diffraction, pigments, neutron
3-908450-77-2
417-422
Trans Tech Publications Ltd
Rooke, J.
f6ac1cda-f123-490e-aef5-5c4e04ac70db
Weller, M.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
2003
Rooke, J.
f6ac1cda-f123-490e-aef5-5c4e04ac70db
Weller, M.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Rooke, J. and Weller, M.
(2003)
Synthesis and characterisation of perovskite-type oxynitrides.
Sajgalík, P., Drábik, M. and Varga, S.
(eds.)
In Solid State Chemistry V. Proceedings of the 5th International Conference on Solid State Chemistry, Bratislava, Slovakia, July 7-12, 2002, under the IUPAC Sponsorship.
Trans Tech Publications Ltd.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Rare earth and alkaline earth tantalum oxynitride perovskite-type systems of the stoichiometry A((1-x))Ln(x)TaO((2-x))N((1+x)), where A is an-alkaline earth metal (Ca, Sr and Ba) and Ln, a lanthanide, have been synthesised and characterised using powder X-ray and neutron diffraction. The samples formed were orthorhombically distorted perovskites and crystallised in the space group Pnma. Further analysis of the diffraction data has highlighted the influences that the nature of the cations incorporated and the distribution of the anions have on crystal structure and lattice size. Thermogravimetric analyses have been performed in air and show the onset of decomposition at ca. 400degreesC for all materials. UV-Vis spectroscopic measurements show that these compounds exhibit absorption bands in the visible region, due to inter-band transitions, with positions that can be correlated with structure and composition.
This record has no associated files available for download.
More information
Published date: 2003
Venue - Dates:
5th International Conference on Solid State Chemistry, under the IUPAC Sponsorship, Bratislava, Slovakia, 2002-07-07 - 2002-07-12
Keywords:
ammonolysis, powder diffraction, oxynitrides, perovskites, ray-powder diffraction, pigments, neutron
Identifiers
Local EPrints ID: 20072
URI: http://eprints.soton.ac.uk/id/eprint/20072
ISBN: 3-908450-77-2
PURE UUID: 40e0dde0-816e-4fc7-aee3-3c98ae4cd0d1
Catalogue record
Date deposited: 23 Feb 2006
Last modified: 07 Dec 2023 17:59
Export record
Contributors
Author:
J. Rooke
Author:
M. Weller
Editor:
P. Sajgalík
Editor:
M. Drábik
Editor:
S. Varga
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics