Phase transition and compression behavior of phase D under the lower mantle condition

Abstract

In situ X-ray diffraction experiments of phase D have been conducted to confirm its stability and compression behavior under the lower mantle conditions by using a combination of multianvil apparatus and synchrotron radiation. Sintered diamond anvils were used to achieve pressures up to 46 GPa and temperature up to 1300 K. High temperature EOS for phase D was derived from obtained X-ray diffraction patterns.