A neutron total scattering study of defect structure in Bi3Nb0.5Y0.5O6.5
X. Liu , I. Abrahams , S. Hull , S.T. Norberg , M. Holdynski , Franciszek Krok
AbstractThe defect structure of the title compound has been analyzed by reverse Monte Carlo (RMC) modeling of neutron total scattering data. The composition exhibits both diffuse scattering and weak superlattice ordering of the cubic fluorite subcell in neutron diffraction patterns. Combined Rietveld analysis of X-ray and neutron data at room temperature reveals oxide ion scattering on three crystallographic sites. Analysis of the RMC model reveals Bi coordination numbers consistent with stereochemical activity of the Bi 6 s2 lone pair electrons. Integration of the O–M–O angular distribution function gives an angular ratio consistent with predominantly \< 110\> vacancy ordering in this system.
|Journal series||Solid State Ionics, ISSN 0167-2738|
|Keywords in English||Bismuth oxide, Defect structure, Fluorite, Neutron total scattering|
|Publication indicators||: 2011 = 2.646 (2) - 2011=3.097 (5)|
|Citation count*||7 (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.