We report Raman measurements of solid oxygen under high static pressures up to 134 GPa through the transition to the metallic phase. Contrary to previous studies, we observed a moderate decrease in intensity of the Raman vibron at the transition, which allows us to characterize unambiguously the metallic phase as a molecular solid. The transition involves a change in lattice of molecular centers and a possible reorientation of the molecules together with a relatively weak change in molecular bonding. We observed a large pressure range of phase coexistence and hysteresis of the transformation.
|Number of pages||4|
|Journal||Physical review B: Condensed matter and materials physics|
|Publication status||Published - 1 Sep 2003|
- SOLID OXYGEN