Abstract
Summary. Calculations of the thermodynamical Gruneisen’s gamma as a function of temperature and volume for iron are presented. The ranges of the relevant pressures and temperatures extend to those corresponding to the Earth’s core. The various crystal structures of iron and several kinds of intermolecular potential functions are considered. It is found that it is not possible to describe the Gruneisen’s gamma for iron with the accuracy needed for an assessment of the thermal state of the core mainly because the available experimental data do not allow a definite choice among the possible potential functions.
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