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Extended x-ray absorption fine structure study of incorporation of Bi and Pb atoms into the crystal structure of Ba4.5Nd9Ti18O54

Published online by Cambridge University Press:  31 January 2011

M. Valant ,
I. Arčon ,
D. Suvorov ,
A. Kodre ,
T. Negas  and
R. Frahm
M. Valant
Affiliation:
“Jožef Stefan” Institute, Jamova 39, University of Ljubljana, 1000 Ljubljana, Slovenia
I. Arčon
Affiliation:
“Jožef Stefan” Institute, Jamova 39, University of Ljubljana, 1000 Ljubljana, Slovenia
D. Suvorov
Affiliation:
“Jožef Stefan” Institute, Jamova 39, University of Ljubljana, 1000 Ljubljana, Slovenia
A. Kodre
Affiliation:
“Jožef Stefan” Institute, Jamova 39, University of Ljubljana, 1000 Ljubljana, Slovenia
T. Negas
Affiliation:
Trans-Tech Inc., Adamstown, Maryland 21702
R. Frahm
Affiliation:
Hamburger Synchrotronstrahlungslabor at Deutsches Elektronen Synchrotron DESY, Hamburg, Germany
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Abstract

In the extended x-ray absorption fine structure (EXAFS) study of the local environment of Bi3+ and Pb2+ ions incorporated in Ba4.5Nd9Ti18O54, actual sites of Bi- and Pb-incorporation are determined. Evidence is given that dopant ions are not distributed randomly on all theoretically possible sites; Bi3+ selectively enters one out of three possible channels, corresponding to the sites x = 0.9484, y = 0.2500, z = 0.2939, and/or x = 0.0455, y = 0.2500, z = 0.6928 previously occupied by Nd3+, while Pb2+ selectively enters site x = 0.4940, y = 0.2500, and z = 0.4993 previously shared by Ba2+ and Nd3+.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 3 , March 1997 , pp. 799 - 804
Copyright
Copyright © Materials Research Society 1997

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