A MODULATED STRUCTURE IN A FLUORITE-TYPE FAST-ION-CONDUCTOR DELTA-(BI2O3)1-X(NB2O5)X

被引：32

作者：

MIIDA, R

TANAKA, M

机构：

[1] TOHOKU UNIV,FAC SCI,DEPT PHYS,AOBA KU,SENDAI,MIYAGI 980,JAPAN

[2] TOHOKU UNIV,SCI MEASUREMENTS RES INST,AOBA KU,SENDAI,MIYAGI 980,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 06期

关键词：

Bismuth oxide; Fast-ion-conductor; Fluorite structure; High-resolution electron microscopy; Incommensurate wave electron diffraction; Modulated structure; X-ray diffraction;

D O I：

10.1143/JJAP.29.1132

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. © 1990 The Japan Society of Applied Physics.

引用

页码：1132 / 1138

页数：7

共 22 条

[1] PSEUDO-SYMMETRY OF MODULATED CRYSTAL-STRUCTURES [J].