Structural behavior of Sr{sub 2}Bi{sub 2}O{sub 5} at high pressures
- CeSMEC, Florida International University, University Park, Miami, FL 33199 (United States)
- Cornell High Energy Synchrotron Source, Ithaca, NY 14853 (United States)
The structure of Bi{sub 2}Sr{sub 2}O{sub 5} at high pressures is investigated by in situ X-ray diffraction (XRD) and Raman scattering methods. Raman results indicate that there are two pressure-induced phase transitions that occurred at {approx}1.4 and {approx}11 GPa, respectively. XRD measurements reveal only one high-pressure phase, which is indexed with a monoclinic unit cell and the possible space groups are P121(No. 3), P1m1(No. 6) and P12/m1(No. 10). The phase transition above 11 GPa is probably due to the symmetry change without discontinuity of the unit cell. The high-pressure phase is quenchable and it is a new dense form and about 11% denser than the normal orthorhombic Bi{sub 2}Sr{sub 2}O{sub 5} at room conditions.
- OSTI ID:
- 20784894
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 2; Other Information: DOI: 10.1016/j.jssc.2005.11.018; PII: S0022-4596(05)00535-9; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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