Theoretical Model for the High-Pressure Melting Process of MgO with the B1 Structure
Materials Science
2021-04-07 v2
Abstract
MgO is an abundant mineral in the rocky mantle of terrestrial planets, but its melting behaviors remain enigmatic. Here we introduce a simple theoretical model to investigate the B1-liquid transition of MgO up to 370 GPa. Vibrational free energies of B1-MgO are fully computed by the moment recurrence technique in quantum statistical physics. On that basis, we associate the melting temperature with the isothermal bulk modulus via the work-heat equivalence principle. This strategy allows us to quantitatively explain recent experimental data. Our numerical analyses would yield insights into planetary dynamics and evolution.
Keywords
Cite
@article{arxiv.2104.01347,
title = {Theoretical Model for the High-Pressure Melting Process of MgO with the B1 Structure},
author = {Tran Dinh Cuong and Anh D. Phan},
journal= {arXiv preprint arXiv:2104.01347},
year = {2021}
}
Comments
accepted for publication in Vacuum 2021