Thermo elastic properties of materials at high temperature are directly related to thermal pressure and volume
expansion of the materials. In the present work we have made a comparative study of temperature dependence of thermal
pressure for geophysical minerals viz. MgO, Al2O3, Grossular Garnet, Olivine and Pyrope rich Garnet by using Suzuki
formulation and Maxwell’s formulation. It is observed that Th
!P calculated by using Suzuki formulation is in good
agreement with the experimental values up to 800K, but after this limit there is a deviation from experimental values,
whereas, in case of Maxwell’s formulation the agreement is valid only upto T=300K. This depart in the agreement has
been interpreted using Hardy’s Theory.
Anderson-Gruneisen parameter, An harmonic Effect, EOS, Debye Temperature, Eulerian strain, finite strain
theory, Geophysical minerals, Gruneisen relation, Hardy’s Theory, Isothermal bulk modulus, Lattice potential energy, Pressure derivative of isothermal bulk modulus, Thermal Pressure, Thermo elastic Properties, volume expansion.
Deptt. Of Applied Science, Dr. Virendra Swarup Memorial Trust Group of Institutions, Unnao, India