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Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide

The structure of lead-technetium pyrochlore has been refined in space group [Formula: see text] with a = 10.36584(2) Å using a combination of synchrotron X-ray and neutron powder diffraction data and confirmed via Electron Diffraction. The oxide is found to be oxygen deficient with a stoichiometry o...

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Autores principales: Kennedy, Brendan J., Ablott, Timothy A., Avdeev, Maxim, Carter, Melody L., Losurdo, Linda, Saura-Muzquiz, Matilde, Thorogood, Kevin J., Ting, Jimmy, Wallwork, Kia S., Zhang, Zhaoming, Zhu, Hanliang, Thorogood, Gordon J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8281135/
https://www.ncbi.nlm.nih.gov/pubmed/34277573
http://dx.doi.org/10.3389/fchem.2021.706269
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author Kennedy, Brendan J.
Ablott, Timothy A.
Avdeev, Maxim
Carter, Melody L.
Losurdo, Linda
Saura-Muzquiz, Matilde
Thorogood, Kevin J.
Ting, Jimmy
Wallwork, Kia S.
Zhang, Zhaoming
Zhu, Hanliang
Thorogood, Gordon J.
author_facet Kennedy, Brendan J.
Ablott, Timothy A.
Avdeev, Maxim
Carter, Melody L.
Losurdo, Linda
Saura-Muzquiz, Matilde
Thorogood, Kevin J.
Ting, Jimmy
Wallwork, Kia S.
Zhang, Zhaoming
Zhu, Hanliang
Thorogood, Gordon J.
author_sort Kennedy, Brendan J.
collection PubMed
description The structure of lead-technetium pyrochlore has been refined in space group [Formula: see text] with a = 10.36584(2) Å using a combination of synchrotron X-ray and neutron powder diffraction data and confirmed via Electron Diffraction. The oxide is found to be oxygen deficient with a stoichiometry of Pb(2)Tc(2)O(7-d). Displacive disorder of the Pb cations is evident from the refinements, as has been observed in Bi(2)Tc(2)O(7-d). X-ray absorption spectroscopic measurements at the Tc K-edge demonstrate the valence of the Tc is greater than 4.0 as anticipated from the refined oxygen stoichiometry. Raman spectroscopy confirms the presence of disorder leading us to conclude that this pyrochlore is the first example of a valence V technetium oxide.
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spelling pubmed-82811352021-07-16 Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide Kennedy, Brendan J. Ablott, Timothy A. Avdeev, Maxim Carter, Melody L. Losurdo, Linda Saura-Muzquiz, Matilde Thorogood, Kevin J. Ting, Jimmy Wallwork, Kia S. Zhang, Zhaoming Zhu, Hanliang Thorogood, Gordon J. Front Chem Chemistry The structure of lead-technetium pyrochlore has been refined in space group [Formula: see text] with a = 10.36584(2) Å using a combination of synchrotron X-ray and neutron powder diffraction data and confirmed via Electron Diffraction. The oxide is found to be oxygen deficient with a stoichiometry of Pb(2)Tc(2)O(7-d). Displacive disorder of the Pb cations is evident from the refinements, as has been observed in Bi(2)Tc(2)O(7-d). X-ray absorption spectroscopic measurements at the Tc K-edge demonstrate the valence of the Tc is greater than 4.0 as anticipated from the refined oxygen stoichiometry. Raman spectroscopy confirms the presence of disorder leading us to conclude that this pyrochlore is the first example of a valence V technetium oxide. Frontiers Media S.A. 2021-07-01 /pmc/articles/PMC8281135/ /pubmed/34277573 http://dx.doi.org/10.3389/fchem.2021.706269 Text en Copyright © 2021 Kennedy, Ablott, Avdeev, Carter, Losurdo, Saura-Muzquiz, Thorogood, Ting, Wallwork, Zhang, Zhu and Thorogood. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Kennedy, Brendan J.
Ablott, Timothy A.
Avdeev, Maxim
Carter, Melody L.
Losurdo, Linda
Saura-Muzquiz, Matilde
Thorogood, Kevin J.
Ting, Jimmy
Wallwork, Kia S.
Zhang, Zhaoming
Zhu, Hanliang
Thorogood, Gordon J.
Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide
title Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide
title_full Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide
title_fullStr Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide
title_full_unstemmed Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide
title_short Synthesis and Structure of Oxygen Deficient Lead-Technetium Pyrochlore, the First Example of a Valence V Technetium Oxide
title_sort synthesis and structure of oxygen deficient lead-technetium pyrochlore, the first example of a valence v technetium oxide
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8281135/
https://www.ncbi.nlm.nih.gov/pubmed/34277573
http://dx.doi.org/10.3389/fchem.2021.706269
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