Host: Japan Association of Mineralogical Sciences
High pressure and temperature experiments using LHDAC was performed to clarify effect of H2 fluid on phase stability and phase relation of enstatite. After heating at 3.1 to 13.8 GPa and 1500 to 2000 K, XRD and Raman measurements indicated that enstatite was decomposed to form forsterite, periclase and coesite/stishovite. SEM and TEM observation of the recovered samples suggested that formation of forsterite and periclase from enstatite under high temperature while, dissolution of SiO2 components.