Conductivity and dielectric response in the ion-exchange intercalated mono- and double-layer hydrates $Cd_{0.75}PS_3Na_{0.5}(H2O)_y, y = 1, 2$

Jeevanandam, P and Vasudevan, S (1998) Conductivity and dielectric response in the ion-exchange intercalated mono- and double-layer hydrates $Cd_{0.75}PS_3Na_{0.5}(H2O)_y, y = 1, 2$. In: The Journal of Physical Chemoistry B, 102 (17). pp. 3082-3089.

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Abstract

Hydrated Na ions have been ion-exchange intercalated into the insulating layered cadmium thiophosphate to give Cd0.75PS3Na0.5(H2O)(y). Intercalation occurs with a dilation of the lattice which depends on the extent of hydration of the interlamellar Na ion; for y = 1 the lattice expansion is 2.8 Angstrom, while for y = 2 it is 5.5 Angstrom. The conductivity and dielectric response of Cd0.75PS3Na0.5(H2O)(y), y = 1, 2, have been investigated as a function of frequency and temperature. The electrical behavior of the two compounds is dramatically different. In the y = 2 compound Na ions are mobile and the material is conducting. The dielectric spectrum is featureless, but the electrical modulus, the reciprocal of the complex dielectric permittivity, exhibits a conductivity relaxation. In contrast, when y = 1, the compound is nonconducting, with the dielectric permittivity exhibiting a relaxation. The relaxation times and activation energy are comparable to that of the dielectric relaxation at acoustic frequencies in ice.

Item Type:	Journal Article
Publication:	The Journal of Physical Chemoistry B
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	19 May 2009 06:54
Last Modified:	19 Sep 2010 05:01
URI:	http://eprints.iisc.ac.in/id/eprint/18305

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