Record number :
1333613
Title of article :
Local environment in Ba2In2−xWxO5+3x/2 oxide ion conductors
Author/Authors :
Sylvie Daviero-Minaud، نويسنده , , Aurélie Rolle، نويسنده , , Chanapa Kongmark، نويسنده , , Rose-Noelle Vannier، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
6
From page :
289
To page :
294
Abstract :
The actual oxygen environment of the tungsten dopant in the Ba2In2−xWxO5+3x/2 solid solution was revealed by combining X-ray absorption spectroscopy at the tungsten LI and LIII edges and at the indium LI edge. Whatever the substitution ratio, the tungsten atoms exhibit a regular octahedral environment. When the substitution ratio increases, the oxygen vacancies are progressively filled until their total occupancy for x=2/3. For x⩾0.3, the perovskite structure is stabilised; the tungsten atoms are randomly distributed in the structure. Although X-ray diffraction revealed a cubic symmetry for these compositions, a local distortion of the indium environment is observed when a tungsten atom is in its surrounding.
Keywords :
Oxide ion conductors , Ba2In2?xWxO5+x/2 , X-ray absorption spectroscopy
Journal title :
JOURNAL OF SOLID STATE CHEMISTRY
Link To Document :