Abstract
The cell dimension and isotropic temperature factors of synthetic periclase, MgO, have been studied as a function of temperature and pressure, using high-temperature, low-temperature, and high-pressure X-ray diffraction apparatus. These parameters have been determined at one atmosphere at temperatures from —196°C to 1040°C, and at 23°C to pressures of 24 kb. Thermal expansion of periclase is in agreement with the previous determination of Skinner (1957). Isotropic temperature factors of magnesium and oxygen increase at similar rates with temperature, but show no significant variation with pressure. A method of correcting for X-ray absorption by the miniature single-crystal diamond cell is presented
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