A simple and straightforward method for the determination of thermal expans
ion is investigated and applied for four minerals of geophysical importance
. The results obtained for four minerals such as Mg2SiO3, Al2O3, Grossular
garnet and Pyrope garnet at different temperatures are found to be in excel
lent agreement with the experimental data. The simplicity of the method is
discussed in the light of another method in high temperature research on mi
nerals. (C) 1999 Elsevier Science Ltd. All rights reserved.