On the Kumar formulation for the temperature dependence of thermal expansivity

摘要

The expression for interionic separation obtained earlier by Kumar [Physica B 205 (1995) 175] has been corrected so as to make it compatible with the value of the thermal expansivity at the initial temperature. The values of the interionic separations as a function of temperature calculated for NaCl and KCl using the modified formulation are found to present improved agreement with the experimental data at high temperatures up to the melting temperatures. (C) 2004 Elsevier B.V. All rights reserved.