Structural organization, micro-phase separation and polyamorphism of liquid MgSiO3 under compression

The structure, structural change and micro-phase separation in liquid MgSiO 3 under pressure are studied by molecular dynamics simulation with pair-wise potentials. Models consisting of 5000 atoms are constructed at 3500 K in the 0–30 GPa pressure range. The structural organization and structural phase transition under compression as well as network topology of liquid MgSiO 3 are clarified through analysis and visualization of molecular dynamics simulation data. The short-range structure, intermediate-range structure and the degree of polymerization as well as structural, compositional and dynamical heterogeneities are also discussed in detail.