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Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography

Intuitively scientists accept that order can emerge from disorder and a significant amount of effort has been devoted over many years to demonstrate this. In metallic alloys and oxides, disorder at the atomic scale is the result of occupation at equivalent atomic positions by different atoms which l...

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Autores principales: Simeone, David, Thorogood, Gordon James, Huo, Da, Luneville, Laurence, Baldinozzi, Gianguido, Petricek, Vaclav, Porcher, Florence, Ribis, Joel, Mazerolles, Leo, Largeau, Ludovic, Berar, Jean Francois, Surble, Suzy
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5473899/
https://www.ncbi.nlm.nih.gov/pubmed/28623293
http://dx.doi.org/10.1038/s41598-017-02787-w
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author Simeone, David
Thorogood, Gordon James
Huo, Da
Luneville, Laurence
Baldinozzi, Gianguido
Petricek, Vaclav
Porcher, Florence
Ribis, Joel
Mazerolles, Leo
Largeau, Ludovic
Berar, Jean Francois
Surble, Suzy
author_facet Simeone, David
Thorogood, Gordon James
Huo, Da
Luneville, Laurence
Baldinozzi, Gianguido
Petricek, Vaclav
Porcher, Florence
Ribis, Joel
Mazerolles, Leo
Largeau, Ludovic
Berar, Jean Francois
Surble, Suzy
author_sort Simeone, David
collection PubMed
description Intuitively scientists accept that order can emerge from disorder and a significant amount of effort has been devoted over many years to demonstrate this. In metallic alloys and oxides, disorder at the atomic scale is the result of occupation at equivalent atomic positions by different atoms which leads to the material exhibiting a fully random or modulated scattering pattern. This arrangement has a substantial influence on the material’s properties, for example ionic conductivity. However it is generally accepted that oxides, such as defect fluorite as used for nuclear waste immobilization matrices and fuel cells, are the result of disorder at the atomic scale. To investigate how order at the atomic scale induces disorder at a larger scale length, we have applied different techniques to study the atomic composition of a homogeneous La (2) Zr (2) O (7) pyrochlore, a textbook example of such a structure. Here we demonstrate that a pyrochlore, which is considered to be defect fluorite, is the result of intricate disorder due to a random distribution of fully ordered nano-domains. Our investigation provides new insight into the order disorder transformations in complex materials with regards to domain formation, resulting in a concord of chemistry with crystallography illustrating that order can induce disorder.
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spelling pubmed-54738992017-06-21 Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography Simeone, David Thorogood, Gordon James Huo, Da Luneville, Laurence Baldinozzi, Gianguido Petricek, Vaclav Porcher, Florence Ribis, Joel Mazerolles, Leo Largeau, Ludovic Berar, Jean Francois Surble, Suzy Sci Rep Article Intuitively scientists accept that order can emerge from disorder and a significant amount of effort has been devoted over many years to demonstrate this. In metallic alloys and oxides, disorder at the atomic scale is the result of occupation at equivalent atomic positions by different atoms which leads to the material exhibiting a fully random or modulated scattering pattern. This arrangement has a substantial influence on the material’s properties, for example ionic conductivity. However it is generally accepted that oxides, such as defect fluorite as used for nuclear waste immobilization matrices and fuel cells, are the result of disorder at the atomic scale. To investigate how order at the atomic scale induces disorder at a larger scale length, we have applied different techniques to study the atomic composition of a homogeneous La (2) Zr (2) O (7) pyrochlore, a textbook example of such a structure. Here we demonstrate that a pyrochlore, which is considered to be defect fluorite, is the result of intricate disorder due to a random distribution of fully ordered nano-domains. Our investigation provides new insight into the order disorder transformations in complex materials with regards to domain formation, resulting in a concord of chemistry with crystallography illustrating that order can induce disorder. Nature Publishing Group UK 2017-06-16 /pmc/articles/PMC5473899/ /pubmed/28623293 http://dx.doi.org/10.1038/s41598-017-02787-w Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Simeone, David
Thorogood, Gordon James
Huo, Da
Luneville, Laurence
Baldinozzi, Gianguido
Petricek, Vaclav
Porcher, Florence
Ribis, Joel
Mazerolles, Leo
Largeau, Ludovic
Berar, Jean Francois
Surble, Suzy
Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
title Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
title_full Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
title_fullStr Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
title_full_unstemmed Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
title_short Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
title_sort intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5473899/
https://www.ncbi.nlm.nih.gov/pubmed/28623293
http://dx.doi.org/10.1038/s41598-017-02787-w
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