The stability of bismuth yttrium oxide doped with tungsten, Bi₃Y_1−xW_xO_6+3x/2, on annealing in air for up to 1000 h at 650 °C was investigated using a.c. impedance spectroscopy and neutron diffraction. Compositions up to x = 0.2 all show some degree of conductivity decay, but only in the case of the x = 0.10 composition is this decay relatively small and not associated with a significant structural change. Details of the short range structure of this composition were investigated by reverse Monte Carlo modelling of total neutron scattering data and again reveal no significant changes prior to and post annealing. A preference for 〈100〉 oxide ion vacancy pair alignment is found in the structure, consistent with models for oxide ion conduction in these systems. Additionally, the total scattering analysis reveals a preferred vacancy association with the W⁶⁺ cations, which adopt a four coordinate geometry in this system.

用交流阻抗谱和中子衍射研究了掺钨Bi ₃ Y _{1- x} W _x O _{6 + 3 x / 2}的氧化铋钇在650°C下于空气中退火长达1000 h的稳定性。直到x  = 0.2的成分都显示出一定程度的电导率衰减，但仅在x的情况下 = 0.10的成分是这种衰减相对较小，并且与重大的结构变化无关。通过总中子散射数据的反向蒙特卡洛模型研究了这种成分的短程结构的细节，并且再次揭示了退火前后的无明显变化。在结构中发现了对<100>氧化物离子空位对排列的偏爱，这与这些系统中的氧化物离子传导模型一致。另外，总散射分析揭示了与W ⁶⁺阳离子的优选空位缔合，其在该系统中采用四坐标几何形状。