In situ X-ray diffraction study of Iron-Magnesium binary system during isothermal compressions at high pressure and high temperature.

The objective is to study in situ the structural behaviour of the iron-magnesium binary systems during isothermal compressions at different temperature (1500K,1800K and 2000K from 20-40 GPa to 100 GPa) in order to obtain new experimental data which will be used for the reassessment of Fe-Mg CALPHAD Hightemperature-High pressure thermodynamic model. This modelling represents an important end-member and is decisive for providing relevant thermodynamicmodelling of more complex oxidized systems, applicable then to geophysical environments.