Electronic Resource
Copenhagen
:
International Union of Crystallography (IUCr)
Applied crystallography online
33 (2000), S. 279-284
ISSN:
1600-5767
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
ReO3 has been studied at pressures up to 52 GPa by X-ray powder diffraction. The previously observed cubic Im3¯ high-pressure phase was shown to transform to a monoclinic MnF3-related phase at about 3 GPa. All patterns recorded above 12 GPa could be indexed on rhombohedral cells. The compressibility was observed to decrease abruptly at 38 GPa. It is therefore proposed that the oxygen ions are hexagonally close packed above this pressure, giving rise to two rhombohedral phases labelled I and II. The zero-pressure bulk moduli Bo of the observed phases were determined and the rhombohedral phase II was found to have an extremely large value of 617 (10) GPa. It was found that ReO3 transforms back to the Pm3¯m phase found at ambient pressure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0021889899016659
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