Structural phase transitions and equations of state for selenium under pressures to 129 GPa
- 13 July 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (2) , 305-307
- https://doi.org/10.1103/physrevlett.69.305
Abstract
By the use of energy-dispersive x-ray diffraction with synchrotron radiation, pressure-induced structural phase transitions and equations of state were studied on Se in the extended pressure range up to 129 GPa. In contrast to a previous study on Se to 50 GPa, the higher resolution with synchrotron radiation in the present study allowed for an unambiguous identification of the structure for Se-IV as rhombohedral (β-Po type) with one atom in the rhombohedral unit cell, and thus, a close similarity to Te under pressure and Po at higher temperatures is reestablished.Keywords
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