A simple approach to analyse the thermal expansion in minerals under the effect of high temperature

A simple and straightforward method is developed for,determining the, volume thermal expansion and its coefficient in minerals (MgO, CaO) -under the effect of high temperature The expressions for the thermal expansion, the thermal expansion coefficients and the bulk modulus are obtained assuming that the Anderson parameter (delta(T)) is not a temperature independent parameter, but varies with temperature. The results achieved in the present study agree closely with the data based on experimental studies of the temperature dependence of the thermal expansion and the bulk modulus at zero pressure. (C) 2003 Published by Elsevier Science B.V.