Pressure-induced phase transitions of β-type pyrochlore CsTaWO6

Zhang, F. X.; Tracy, C. L.; Shamblin, J.; Palomares, R. I.; Lang, M.; Park, S.; Park, C.; Tkachev, S.; Ewing, R. C.

doi:10.1039/c6ra11185h

Title: Pressure-induced phase transitions of β-type pyrochlore CsTaWO₆

Abstract

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¯m 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. Lastly, these results may provide a structural explanation of previous experimental resistivity measurement results for the isostructural superconductor K(Cs)Os₂O₆ at high pressure conditions.

Authors:

Zhang, F. X. ^[1]; Tracy, C. L. ^[2]; Shamblin, J. ^[3]; Palomares, R. I. ^[3]; Lang, M. ^[3]; Park, S. ^[2]; Park, C. ^[4]; Tkachev, S. ^[5]; Ewing, R. C. ^[2]

Univ. of Michigan, Ann Arbor, MI (United States)
Stanford Univ., Stanford, CA (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Carnegie Institution of Washington, Washington, D.C. (United States)
Univ. of Chicago, Chicago, IL (United States)

Publication Date:: Fri Sep 30 00:00:00 EDT 2016

Research Org.:: Univ. of Michigan, Ann Arbor, MI (United States); Carnegie Institution of Washington, Washington, D.C. (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1329475

Grant/Contract Number:: NA0001977; NA0002006

Resource Type:: Accepted Manuscript

Journal Name:: RSC Advances

Additional Journal Information:: Journal Volume: 6; Journal Issue: 97; Journal ID: ISSN 2046-2069

Publisher:: Royal Society of Chemistry

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Zhang, F. X., Tracy, C. L., Shamblin, J., Palomares, R. I., Lang, M., Park, S., Park, C., Tkachev, S., and Ewing, R. C. Pressure-induced phase transitions of β-type pyrochlore CsTaWO6.  United States: N. p., 2016. 
Web.  doi:10.1039/c6ra11185h.

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                    Zhang, F. X., Tracy, C. L., Shamblin, J., Palomares, R. I., Lang, M., Park, S., Park, C., Tkachev, S., & Ewing, R. C. Pressure-induced phase transitions of β-type pyrochlore CsTaWO6.  United States.  https://doi.org/10.1039/c6ra11185h

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                    Zhang, F. X., Tracy, C. L., Shamblin, J., Palomares, R. I., Lang, M., Park, S., Park, C., Tkachev, S., and Ewing, R. C. Fri .  
"Pressure-induced phase transitions of β-type pyrochlore CsTaWO6".  United States.  https://doi.org/10.1039/c6ra11185h.  https://www.osti.gov/servlets/purl/1329475.

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@article{osti_1329475,

  title        = {Pressure-induced phase transitions of β-type pyrochlore CsTaWO6},

  author       = {Zhang, F. X. and Tracy, C. L. and Shamblin, J. and Palomares, R. I. and Lang, M. and Park, S. and Park, C. and Tkachev, S. and Ewing, R. C.},

  abstractNote = {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¯m 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. Lastly, these results may provide a structural explanation of previous experimental resistivity measurement results for the isostructural superconductor K(Cs)Os2O6 at high pressure conditions.},

  doi          = {10.1039/c6ra11185h},

  journal      = {RSC Advances},

  number       = 97,

  volume       = 6,

  place        = {United States},

  year         = {Fri Sep 30 00:00:00 EDT 2016},

  month        = {Fri Sep 30 00:00:00 EDT 2016}

}

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Title: Pressure-induced phase transitions of β-type pyrochlore CsTaWO6

Abstract

Citation Formats

Connection between oxygen-ion conductivity of pyrochlore fuel-cell materials and structural change with composition and temperature journal, April 2000

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Title: Pressure-induced phase transitions of β-type pyrochlore CsTaWO₆

Connection between oxygen-ion conductivity of pyrochlore fuel-cell materials and structural change with composition and temperature
journal, April 2000

New β-Pyrochlore Oxide Superconductor CsOs ₂ O ₆
journal, July 2004

The order–disorder transition in ion-irradiated pyrochlore
journal, March 2003

Radiation stability of gadolinium zirconate: A waste form for plutonium disposition
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Facile Room Temperature Ion-Exchange Synthesis of Sn ²⁺ Incorporated Pyrochlore-Type Oxides and Their Photocatalytic Activities
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Phase Stability and Pressure Dependence of Defect Formation in ${Gd}_{2} {Ti}_{2} O_{7}$ and ${Gd}_{2} {Zr}_{2} O_{7}$ Pyrochlores
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An Oxygen-Rich Pyrochlore with Fluorite Composition
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