Microstructural investigation of a new complex oxide Ho2Mn2/3Nb4/3O7 with a pyrochlore-related structure

被引：13

作者：

Nakano, H ^{[1
]}

Kishigami, A

Hisa, M

Kamegashira, N

机构：

[1] Ryukoku Univ, Electron Microscope Lab, Otsu, Shiga 5202194, Japan

[2] Ryukoku Univ, Dept Chem Mat, Otsu, Shiga 5202194, Japan

[3] Ryukoku Univ, High Tech Res Ctr, Otsu, Shiga 5202194, Japan

[4] Toyohashi Univ Technol, Dept Mat Sci, Toyohashi, Aichi 4418580, Japan

来源：

MATERIALS RESEARCH BULLETIN | 1999年 / 34卷 / 12-13期

关键词：

oxides; electron microscopy; X-ray diffraction;

D O I：

10.1016/S0025-5408(99)00210-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A complex oxide Ho2Mn2/3Nb4/3O7 with a pyrochlore-related structure was synthesized from Ho2O3, MnO, and Nb2O5 in Ar containing 1% H-2 atmosphere. Its structure was investigated by powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). The oxide, which was determined to be Ho(2.0)Hn(0.6)Nb(1.40)O(7.1) by an electron probe microanalyzer (EPMA), had a monoclinic symmetry (space group C2/c) with lattice parameters a = 1.2813(3), b = 0.7397(1), c = 1.1625(2) nm, and beta = 100.575(8)degrees. The oxide had a large number of lamellar domains bounded by planar defects on (001), and such domains were composed of twinned structures on the twin axis <110>. (C) 2000 Elsevier Science Ltd.

引用

页码：2075 / 2084

页数：10

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