Isotope effects in dense solid hydrogen: Phase transition in deuterium at 190±20 GPa
- 25 September 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (13) , 1393-1395
- https://doi.org/10.1103/physrevlett.63.1393
Abstract
Raman measurements of solid normal deuterium compressed in a diamond-anvil cell indicate that the material undergoes a structural phase transformation at 190±20 GPa and 77 K. Spectroscopically, the transition appears analogous to that observed in hydrogen at 145±5 GPa. The large isotope effect on the transition pressure suggests there is a significant vibrational contribution to the relative stability of the solid phases of hydrogen at very high densities.Keywords
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