STUDIES OF CRYSTALLINE SOLIDS AT HIGH-PRESSURE AND TEMPERATURE USING THE DIA MULTI-ANVIL APPARATUS

Large volume high pressure devices of the DIA-type have been interface d with high energy synchrotron X-radiation at the MAX-80 facility at t he KEK in Japan and at the SAM-85 facility at the National Synchrotron Light Source. The optics and detectors at these installations are opt imized for rapid switching between monochromatic and energy dispersive modes of operation. This allows routine exploration of phase diagrams at high pressures and temperatures along with the determination of st ructure from high resolution powder diffraction data. The addition of translating imaging plates makes possible the determination of the kin etic parameters for phase transitions and order-disorder phenomena fro m real-time data.