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Structural studies of α-Bi2O3 by neutron powder diffraction

Published online by Cambridge University Press:  05 March 2012

S. A. Ivanov ,
R. Tellgren ,
H. Rundlo¨f  and
V. G. Orlov
S. A. Ivanov
Affiliation:
X-ray Laboratory, Department of Inorganic Materials, Karpov’ Institute of Physical Chemistry, Vorontsovo pole 10, 103064 Moscow K-64, Russia
R. Tellgren
Affiliation:
Inorganic Chemistry, A˚ngstrom Laboratory, Box 538, Uppsala University, SE-75121 Uppsala, Sweden
H. Rundlo¨f
Affiliation:
Inorganic Chemistry, A˚ngstrom Laboratory, Box 538, Uppsala University, SE-75121 Uppsala, Sweden
V. G. Orlov
Affiliation:
Russian Research Center Kurchatov Institute, Moscow, Russia
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Abstract

A detailed neutron powder diffraction study of the atomic structure of α-Bi2O3 at high temperatures using the Rietveld method was performed to clarify the nature of the unusual magnetic behavior and the origin of the high temperature dielectric anomalies of α-Bi2O3 in the temperature interval 300–700 K. Analysis of obtained experimental data shows that there are no evidence of a structural phase transition in α-Bi2O3 between 295 and 660 K. The observed high temperature dielectric anomalies in α-Bi2O3 are evidently governed by changes in the electron subsystem of the bismuth oxide.

Type
New Diffraction Data
Information
Powder Diffraction , Volume 16 , Issue 4 , December 2001 , pp. 227 - 230
Copyright
Copyright © Cambridge University Press 2001

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