The equation of state for periclase

Collecting the complete data set from previous experiments on periclase, covering pressure and temperature ranges 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 equations of state (EoSs) 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.