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

0479767 - FZÚ 2018 RIV GB eng J - Journal Article
Simeone, D. - Thorogood, G.J. - Huo, D. - Luneville, L. - Baldinozzi, G. - Petříček, Václav - Porcher, F. - Ribis, J. - Mazerolles, L. - Largeau, L. - Berar, J.F. - Surble, S.
Intricate disorder in defect fluorite/pyrochlore: a concord of chemistry and crystallography.
Scientific Reports. Roč. 7, Jun (2017), 1-7, č. článku 3727. ISSN 2045-2322. E-ISSN 2045-2322
Institutional support: RVO:68378271
Keywords : disorder * atomic scale * metallic allys * oxides * fluorite/pyrochlore
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.122, year: 2017

In metallic alloys and oxides, disorder at the atomic scale is the result of occupation at equivalent atomic positions by different atoms. 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 homogeneo us La2Zr2O7 pyrochlore, a textbook example of such a structure. Here we demonstrate that a pyrochlore is the result of intricate disorder due to a random distribution of fully ordered nano-domains.

Permanent Link: http://hdl.handle.net/11104/0275709