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IJPAP Vol.43(09) [September 2005] >


Title: Effective charges in ternary chalcogenide spinels
Authors: Kushwaha, A K
Kushwaha, S S
Keywords: Dynamical charges
Ternary chalcogenide spinels
Transverse charges
Longitudinal charges
Issue Date: Sep-2005
Publisher: CSIR
IPC CodeG03G
Abstract: The effective ionic charge Z*e of each ion is determined within a narrow variable range for ternary chalcogenide spinel compounds. The Szigeti effective charge e*s is also evaluated for the anion and cation using the observed optical dielectric constant Ɛω. The correlation between e*s and the dielectric constant Ɛω are empirically found as Ɛω-1=2.0/[(e*s./Zeff e)+(e*s./Zeff e)2].From effective ionic charges, we conclude that the ionicity increases in the order oxide > sulphide > selenide, indium compounds > chromium compounds, normal spinel > inverse spinel.
Page(s): 664-667
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.43(09) [September 2005]

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