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Solid State Synthesis of Double Molybdates of Potassium and Lanthnones and their Conductivity Behaviour

Published online by Cambridge University Press:  28 February 2011

Suba K. ,
Udupa M.R  and
Syamasundara Rao Y.
Suba K.
Affiliation:
Department of Chemistry, Indian Institute of Technology, Madras 600 036, India
Udupa M.R
Affiliation:
Department of Chemistry, Indian Institute of Technology, Madras 600 036, India
Syamasundara Rao Y.
Affiliation:
Department of Physics, Indian Institute of Technology, Madras 600 036, India
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Abstract

Double molybdates, KLn(MoO4)2 and K5Ln(MoO4)4 have been synthesised utilising the solid state reactions of KIO3 Ln203 and MoO3 (Ln=La,Gd,Dy) in appropriate mole ratios, employing thermal analysis techniques. The solid phases have been characterised by IR, XRD studies and magnetic measurements. The d.c. electrical conductivity values of the two molybdates measured in the temperature range 373–623K are found to increase with rise in temperature. This observation together with the calculated jump activation enthalpies and the supposed ‘layered’ type structure with the loosely held K+ ion between the layers support the ionic conductivity mechanism in these samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 411
Copyright
Copyright © Materials Research Society 1991

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