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Synthesis, Structure and Dielectric Properties of Na2SnTeO6

Published online by Cambridge University Press:  16 February 2011

J.-H. Park ,
P.M. Woodward ,
J.B. Parise ,
I. Lubomirsky  and
O. Stafsudd
J.-H. Park
Affiliation:
CHiPR, Geosciences, SUNY, Stony Brook, NY 11794-2100 Dept. of Chemistry and Geosciences, SUNY, Stony Brook, NY 11794-2100
P.M. Woodward
Affiliation:
Dept. of Chemistry, The Ohio State University, Columbus, OH 43210-1185
J.B. Parise
Affiliation:
CHiPR, Geosciences, SUNY, Stony Brook, NY 11794-2100 Dept. of Chemistry and Geosciences, SUNY, Stony Brook, NY 11794-2100 Geosciences, SUNY, Stony Brook, NY 11794-2100
I. Lubomirsky
Affiliation:
Dept. of Electrical Engineering (IV), UCLA, Los Angeles, CA,90024
O. Stafsudd
Affiliation:
Dept. of Electrical Engineering (IV), UCLA, Los Angeles, CA,90024
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Abstract

A new perovskite was recovered from the high pressure-high temperature treatment of the α-TlSbO3 form of Na2SnTeO6 at 7 GPa and 950 °C for 30 minutes. Synchrotron x-ray powder diffraction data show the space group is P21/n with a=5.40361 (5), b=5.46152(5), c=7.69288(7) Å and ß=90.034(3)°. Using disk samples of both polymorphs, the dielectric properties were measured as a function of temperature. At ambient conditions, the perovskite form has a more than 1.5 fold enhancement in dielectric constant compared to the α-TlSbO3 form while the molar volume and the molecular polarizability decrease.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 547: Symposium DD – Solid-State Chemistry of Inorganic Materials II , 1998 , 139
Copyright
Copyright © Materials Research Society 1999

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