Accurate nuclear-density distribution of bismuth oxide solution Bi1.4Yb0.6O3 compound was studied at 384 and 738C by using the maximum-entropy method (MEM) and MEM-based pattern fitting combined with the Rietveld method using neutron powder diffraction data. The results revealed that the oxide ions had a complicated disorder spreading over a wide area, shifted to the <111> directions from the ideal fluorite position and diffused along the <100> directions.

Visualization of the Diffusion Path in the Fast Oxide-Ion Conductor Bi1.4Yb0.6O3. M.Yashima, D.Ishimura: Applied Physics Letters, 2005, 87[22], 221909 (3pp)