STATIC P-T-V MEASUREMENTS ON MgO: COMPARISON WITH SHOCK WAVE DATA

摘要: Simultaneous P-V-T measurements of MgO have been carried out at pressures to 20 GPa and simultaneously 680 K in a high pressure-temperature diamond-anvil cell using the x-ray diffraction technique radiation source Stanford Synchrotron Research Laboratory. The sample temperature was measured with precalibrated Pt-Pt% Rh thermocouple pressure determined from an internal Au standard by deduced shock wave data Jamieson et al _. [1982]. experimental P-V isotherms are approximately parallel, indicating invariance KT constant volume, as observed alkali metals halides. At temperatures, however, present isothermal yield consistently ˜0.5% higher compression (V/VO) values compared data, resulting (˜1 GPa) gold than MgO. Until this discrepancy is resolved, suitability calibrant temperatures cannot be established.