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Synthesis and characterization of mixed fluorides with PbF2 and ScF3

Published online by Cambridge University Press:  01 March 2012

S. N. Achary  and
A. K. Tyagi
S. N. Achary
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India
A. K. Tyagi*
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India
*
a)Electronic mail: aktyagi@magnum.barc.ernet.in; Fax: 0091-22-25505151 0091-22-25519613.
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Abstract

A series of mixed fluoride compositions with PbF2 and ScF3 were prepared by heating the intimate mixtures of component fluorides at 600 °C for 10 h followed by slowly cooling to room temperature. The products obtained were analyzed by powder XRD to reveal the phases present in them and hence the low-temperature phase equilibria in the PbF2-ScF3 system. The phase equilibria show the fluorite-type solid solution up to the composition of about 15 mol% of ScF3 in the PbF2 lattice. The unit cell volume decreases with increasing ScF3 contents in the fluorite-type solid solutions. Beyond the solubility limit, the biphasic mixture of the cubic fluorite-type solid solution and leftover ScF3 is found to exist.

Keywords

fluoridespowder xrdphase equilibria
Type
New Diffraction Data
Information
Powder Diffraction , Volume 20 , Issue 3 , September 2005 , pp. 254 - 258
Copyright
Copyright © Cambridge University Press 2005

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