Periclase Zhang J Physics and Chemistry of Minerals 27 (2000) 145-148 Effect of pressure on the thermal expansion of MgO up to 8.2 GPa Sample: Run1 at T = 673 K, P = 2.66 GPa _database_code_amcsd 0008372 4.2081 4.2081 4.2081 90 90 90 Fm3m atom x y z Mg 0 0 0 O .5 .5 .5