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Equations of state of MgO at high pressure and temperature |
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| Authors: | D Martíinez-García Y Le Godec M Mézouar G Syfosse J P Itié J M Besson |
| Institution: | 1. ICMUV, Ed. Investigación , p1.1, Dr. Moliner, 50, 46100, Burjassot, Valencia, Spain;2. LURE, Bat. 2090, Centre Universitaire Paris , Sud, 91405, Orsay, France;3. PMC, Université P&4. M Curie , T13, E4, B77, 4 Place Jussieu, 75252, Paris, France;5. European Synchrotron Radiation Facility , Grenoble, 38043, France;6. LURE, Bat. 2090, Centre Universitaire Paris , Sud, 91405, Orsay, France;7. PMC, Université P& |
| Abstract: | Abstract A synchrotron X-ray diffraction study on MgO has been done at simultaneous high pressure and temperature. The lattice parameter of MgO has been measured up to a static pressure of 6 GPa and a temperature of 1273 K, using a large volume pressure cell and energy-dispersive synchrotron X-ray powder diffraction. The compression was made following six high-temperature isotherms. A Vinet equation of state was used to fit the experimental P-V-T data. The Vinet's model compares very well with the experimental data above the Debye temperature (760 K) and allows the use of MgO as an alternative internal pressure calibrant for experiments at high temperature. |
| Keywords: | MgO high-pressure high-temperature equations of state X-ray diffraction synchrotron radiation |