A study of tantalum pentoxide Ta2O5 structures up to 28 GPa
Abstract
In this study, tantalum pentoxide Ta2O5 with the orthorhombic L-Ta2O5 structure has been experimentally studied up to 28.3 GPa (at ambient temperature) using synchrotron angle-dispersive powder X-ray diffraction (XRD). The ambient pressure phase remains stable up to 25 GPa where with increased pressure a crystalline to amorphous phase transition occurs. A detailed equation of state (EOS), including pressure dependent lattice parameters, is reported. The results of this study were compared with a previous high-pressure XRD study by Li et al. A clear discrepancy between the ambient-pressure crystal structures and, consequently, the reported EOSs between the two studies was revealed. Finally, he origin of this discrepancy is attributed to two different crystal structures used to index the XRD patterns.
- Authors:
-
[1];
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1357391
- Alternate Identifier(s):
- OSTI ID: 1379842
- Report Number(s):
- LLNL-JRNL-724997
Journal ID: ISSN 0021-8979; JAPIAU
- Grant/Contract Number:
- AC52-07NA27344; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 17; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Stavrou, Elissaios, Zaug, Joseph M., Bastea, Sorin, and Kunz, Martin. A study of tantalum pentoxide Ta2O5 structures up to 28 GPa. United States: N. p., 2017.
Web. doi:10.1063/1.4982708.
Stavrou, Elissaios, Zaug, Joseph M., Bastea, Sorin, & Kunz, Martin. A study of tantalum pentoxide Ta2O5 structures up to 28 GPa. United States. https://doi.org/10.1063/1.4982708
Stavrou, Elissaios, Zaug, Joseph M., Bastea, Sorin, and Kunz, Martin. Tue .
"A study of tantalum pentoxide Ta2O5 structures up to 28 GPa". United States. https://doi.org/10.1063/1.4982708. https://www.osti.gov/servlets/purl/1357391.
@article{osti_1357391,
title = {A study of tantalum pentoxide Ta2O5 structures up to 28 GPa},
author = {Stavrou, Elissaios and Zaug, Joseph M. and Bastea, Sorin and Kunz, Martin},
abstractNote = {In this study, tantalum pentoxide Ta2O5 with the orthorhombic L-Ta2O5 structure has been experimentally studied up to 28.3 GPa (at ambient temperature) using synchrotron angle-dispersive powder X-ray diffraction (XRD). The ambient pressure phase remains stable up to 25 GPa where with increased pressure a crystalline to amorphous phase transition occurs. A detailed equation of state (EOS), including pressure dependent lattice parameters, is reported. The results of this study were compared with a previous high-pressure XRD study by Li et al. A clear discrepancy between the ambient-pressure crystal structures and, consequently, the reported EOSs between the two studies was revealed. Finally, he origin of this discrepancy is attributed to two different crystal structures used to index the XRD patterns.},
doi = {10.1063/1.4982708},
journal = {Journal of Applied Physics},
number = 17,
volume = 121,
place = {United States},
year = {Tue May 02 00:00:00 EDT 2017},
month = {Tue May 02 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
Prediction of structural properties of protactinium pentoxide ${{Pa}}_{2}{O}_{5}$ by first-principlescalculations
journal, August 2018
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