New Phase Transition of Solid Bromine under High Pressure
- Universite de Lyon, F-69000 Lyon, France and Universite de Lyon 1, Laboratoire PMCN, CNRS, UMR 5586, F69622 Villeurbanne Cedex (France)
- Physique de la Matiere Condensee, Universite de Liege, B-4000 Liege (Belgium)
- IMPMC, CNRS UMR 7590, Universite Pierre et Marie Curie, F-75352, Paris 6, Paris (France)
- European Synchrotron Radiation Facility, BP220, F-38043 Grenoble (France)
Solid bromine has been studied by x-ray absorption spectroscopy experiments up to a maximum pressure of 75 GPa. The data analysis of the extended fine structure reveals that the intramolecular distance first increases, reaching its maximum value at 25{+-}5 GPa. From this value the intramolecular distance abruptly begins to decrease evidencing a nonpreviously observed phase transformation taking place at 25{+-}5 GPa. A maximum variation of 0.08 A ring is observed at 65{+-}5 GPa where again a phase transition occurs. This last transformation could correspond with the recently observed change to an incommensurate modulated phase. We discuss the possible generalization of the observed new phase transition at 25{+-}5 GPa to the case of the other halogens.
- OSTI ID:
- 20957856
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.99.015501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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