Abstract
In situ X-ray diffractions on high-pressure minerals of CaIrO3-type structure were carried out using a laser-heated diamond anvil cell (LHDAC) up to a pressure of 200 GPa with X-rays from a synchrotron radiation source at BL10XU, SPring-8 and BL13A, Photon Factory. The phase transformations form low-pressure forms to CaIrO3-type structure were observed in Fe2O3, Al2O3, and MgSiO3. The CaIrO3-type structure is likely to be one of important structures in A2O3- and ABO3-type minerals at high-pressure and high-temperature conditions.
