On the thermodynamics of the solidification of the Earth’s core

It has been shown that in the model of solidification in the inner solid Earth’s core, a phase transition at the interface between the solid core and outer liquid core is stepwise in the presence of a relatively small static shear modulus and shear acoustic vibrations in the inner core. The entropy and volume jumps, temperature hysteresis, and other thermodynamic derivatives certainly related to each other have been calculated taking into account the possible critical behavior of the system and using geophysical data.