Baric fragmentation of iron and nature of fluidity of external Earth's core

Nature of the liquid-like behavior of matter in the external Earth’s core is not fully clear until now. It is known that the Earth’s core consists of 94 % iron. To study the nature of external Earth’s core the dependences of specific surface energy (s) and the self-diffusion coefficient ( Df ) versus the relative volume ( V / V 0) are calculated for the iron. For description of the pair interaction of atoms of iron, the Mie-Lennard-Jones potential was used. For the calculations of dependences s( V / V 0) and Df ( V / V 0) the author’s methods were used. We evaluated the values of V / V 0 and pressures, under which the fragmentation condition for the crystal of iron was realized: s