H. J. Reichmann, Ross J. Angel, H. Spetzler, W. A. Bassett; Ultrasonic interferometry and X-ray measurements on MgO in a new diamond anvil cell. American Mineralogist ; 83 (11-12_Part_1): 1357–1360. doi: https://doi.org/10.2138/am-1998-11-1226
The compressional sound wave velocity, v p , of synthetic MgO in the (100) direction and the unit-cell parameter have been measured up to a maximum pressure of 6.1 GPa using a new type of diamond-anvil cell. The main feature of the cell is the transverse access of the X-ray beam into the sample chamber. This allows us to undertake single crystal X-ray measurements while the ultrasonic attachment is mounted on the diamond-anvil cell. The sound velocity and the elastic parameter c 11 have been determined from these measurements; the variation with pressure can be described by delta c 11 /delta p = 9.35(13), in good agreement with previous studies.