Abstract
The ultrahigh-pressure technique in multimegabar pressures range has been developed using a diamond anvil cell (DAC) and the feasible range of static pressure is extended beyond 300 GPa. By synchrotron radiation x-ray diffraction and Raman scattering experiments on the base of this technique, high-pressure behaviors of elemental materials, that is, O2, S, Se, Te, P, Mg, Al, Ti and Sc have been investigated, and unique and/or unexpected high-pressure phenomena, such as structure phase transitions, metallization and molecular dissociation are revealed at ultra-high pressures. These results will help scientists to enrich their understanding (physical view) of materials under the extremely high-density condition.
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