A Modulated Structure in a Fluorite-Type Fast-Ion-Conductor δ-(Bi2O3)1-x(Nb2O5)x
A Modulated Structure in a Fluorite-Type Fast-Ion-Conductor δ-(Bi2O3)1-x(Nb2O5)x
复制标题
萤石型快离子导体δ-(Bi2O3)1-x(Nb2O5)x中的调制结构
DOI：
10.1143/jjap.29.1132
复制
发表时间：
1990
影响因子：
1.5
通讯作者：
Michiyoshi Tanaka
中科院分区：
文献类型：
--
作者：
R. Miida;Michiyoshi Tanaka
The modulated structure of the fluorite-related δ-(Bi2O3)1-x(Nb2O5)x compounds was investigated by electron diffraction, high-resolution electron microscopy and X-ray powder diffraction. It was described by the substitutional and displacing waves with a common wave number vector qk111. The value of q increased from 0.360 to 0.383 with increasing x from 0.13 to 0.24. The substitutional waves were expressed by 0.2–0.042·cos 2πqx/d111 for cations and 0.15+0.039·cos 2πqx/d111 for anions. The displacing waves were expressed by 0.0029d111·sin 2πqx/d111 and 0.171d111·sin 2πqx/d111 for cations and anions, respectively. The Debye-Waller factor for O2- ions was determined as about 10 Å and 4.2 Å2 with O2- ions to occupy the 8(c) and 32(f) sites, respectively.
