X-ray and neutron diffraction studies on nickel zinc manganite Mn2.35-xNi0.65ZnxO4 powders

被引：22

作者：

Guillemet-Fritsch, S ^{[1
]}

Baudour, JL

Chanel, C

Bouree, F

Rousset, A

机构：

[1] Univ Toulouse 3, Lab Chim Mat Inorgan & Energet, Unite Mixte CNRS,INPT,, Ctr Inter Univ Rech & Ingn Mat,CIRIMAT, F-31062 Toulouse 04, France

[2] Univ Toulon & Var, UPRES 2135, Lab Mat Multiphases & Interfaces, F-83957 La Garde, France

[3] CEN Saclay, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France

来源：

SOLID STATE IONICS | 2000年 / 132卷 / 1-2期

关键词：

X-ray diffraction; neutron diffraction; nickel zinc manganite;

D O I：

10.1016/S0167-2738(00)00728-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nickel zinc manganite Mn2.35-xNi0.65ZnxO4 powders were investigated by X-ray and neutron diffraction experiments. The variation of the cell parameters determined from X-ray data was used to get an estimate of the cationic distribution. Neutron diffraction experiments were performed to obtain room-temperature structural parameters, the tetrahedral and octahedral average scattering lengths and the oxygen-cation distances. Because of the opposite signs of the scattering lengths (b(Mn) and b(Zn)), the neutron data allow to determine, with high precision, the concentration of the cations on the different sites of the spinel structure. The cationic distribution determined from these data indicated that a small part of the Zn2+ cations occupy the octahedral sites, for zinc-rich oxides (x > i). (C) 2000 Elsevier Science B.V. Ah rights reserved.

引用

页码：63 / 69

页数：7

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