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Issue 97, 2016, Issue in Progress
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Pressure-induced phase transitions of β-type pyrochlore CsTaWO6

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The β-type pyrochlore CsTaWO6 was studied by synchrotron X-ray diffraction (XRD) and Raman scattering methods up to pressures of 43 GPa using a diamond anvil cell (DAC). With increasing pressure, the cubic pyrochlore in space group of Fd-[3 with combining macron]m transforms to an orthorhombic structure (space group: Pnma) at 5.9 GPa and then to a monoclinic structure (space group: P21/c) at ∼18 GPa. The structural evolution in CsTaWO6 is a continuous process and experimental results suggest that the initial cubic phase has a tetragonal distortion at ambient conditions. Both XRD and Raman measurements indicate that the pressure-induced phase transitions in CsTaWO6 are reversible. These results may provide a structural explanation of previous experimental resistivity measurement results for the isostructural superconductor K(Cs)Os2O6 at high pressure conditions.

Graphical abstract: Pressure-induced phase transitions of β-type pyrochlore CsTaWO6

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Publication details

The article was received on 16 May 2016, accepted on 18 Sep 2016 and first published on 30 Sep 2016

Article type: Paper
DOI: 10.1039/C6RA11185H
Citation: RSC Adv., 2016,6, 94287-94293
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    Pressure-induced phase transitions of β-type pyrochlore CsTaWO6

    F. X. Zhang, C. L. Tracy, J. Shamblin, R. I. Palomares, M. Lang, S. Park, C. Park, S. Tkachev and R. C. Ewing, RSC Adv., 2016, 6, 94287
    DOI: 10.1039/C6RA11185H

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