P-V-T Equation of State for Periclase

Details P-V-T Equation of State for Periclase P-V-T Equation of State for Periclase

2008-05-02

arxiv.org/abs/0805.0249v2

Computer Coupling of Phase Diagrams and Thermochemistry, CALPHAD, 33 (2009) 737-743

Physics

Geophysics

Scientific paper

Collecting the complete data set of previous experiments on periclase, covering a pressure and temperature range of 0-141.8 GPa and 100-3031 K respectively, the first comprehensive P-V-T description of MgO is presented comprising all previous experiments. The P-V-T EoS of Birch-Murnaghan, Rydberg-Vinet and Garai are determined by unrestricted fitting. The three EoSs are consistent and a unique set of parameters is able to cover the entire pressure and temperature range. The RMS misfits for the pressure are 0.371 GPa, 0.381 GPa and 0.396 GPa for the Garai, Birch-Murnaghan and Rydberg-Vinet EoSs. The RMS misfits for the volume and the temperature are 0.018 cm3 and 60.3 K for the EoS of Garai.

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