Diffraction Image of Post-perovskite (IMAGE) University of California - Berkeley Caption X-ray diffraction image of the post-perovskite phase of the mineral magnesium silicate glass (MgSiO3), produced in a diamond-anvil cell under 1.85 million times atmospheric pressure and heated to 3500 Kelvin. Credit Advanced Light Source/LBNL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.