Total scattering analysis of cation coordination and vacancy pair distribution in Yb substituted δ-Bi2O3
Marzena Leszczyńska - Redek , X. Liu , Wojciech Wróbel , Marcin Małys , S.T. Norberg , S. Hull , Franciszek Krok , I. Abrahams
AbstractReverse Monte Carlo (RMC) modelling of neutron total scattering data, combined with conventional Rietveld analysis of x-ray and neutron data, has been used to describe the cation coordination environments and vacancy pair distribution in the oxide ion conducting electrolyte Bi3YbO 6. The thermal variation of the cubic fluorite unit cell volume, monitored by variable temperature x-ray and neutron experiments, reveals significant curvature, which is explained by changes in the oxide ion distribution. There is a significant increase in tetrahedral oxide ion vacancy concentration relative to δ-Bi2O3, due to the creation of Frenkel defects associated with the Yb3+ cation. The tetrahedral oxide ion vacancy concentration increases from room temperature to 800 ° C, but little change is observed in the vacancy pair distribution with temperature. The vacancy pair distributions at both temperatures are consistent with a favouring of 100 vacancy pairs. © 2013 IOP Publishing Ltd.
|Journal series||Journal of Physics-Condensed Matter, ISSN 0953-8984|
|Publication size in sheets||22710.35|
|Score|| = 30.0, 09-01-2020, ArticleFromJournal|
= 30.0, 09-01-2020, ArticleFromJournal
|Publication indicators||= 10; = 3.0; : 2013 = 1.035; : 2013 = 2.223 (2) - 2013=2.335 (5)|
|Citation count*||3 (2015-05-11)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.