LaNiO2:: Synthesis and structural characterization

被引:43
作者
Crespin, M
Isnard, O
Dubois, F
Choisnet, J
Odier, P
机构
[1] CNRS, UPR 5031, Lab Cristallog, F-38042 Grenoble, France
[2] CNRS Univ, UMR, Ctr Rech Mat Divisee, F-45071 Orleans, France
[3] Maison Univ, Inst Univ France, F-75005 Paris, France
[4] ENSICAEN, CRISMAT, CNRS, UMR, F-14050 Caen, France
关键词
LaNiO2; nickel monovalent; controlled reduction;
D O I
10.1016/j.jssc.2005.01.023
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The preparation of a single phase LaNiO2 by controlled H-2 reduction of the perovskite LaNiO3 is reported. The different steps of the synthesis are detailed. The structural characterization is made by X-ray diffraction (XRD) and neutron powder diffraction (NPD) and discussed; the derived crystal structure is the infinite-layer CaCuO2. Both XRD and NPD patterns are characterized by anisotropic shape broadening originating from size effect linked to the reduction process. From NPD, the LaNiO2 powder is composed of platelet-like crystallites having an average thickness equal to 20 nm along the [001] direction. A modulation of the neutron diffraction background is observed and discussed in connection to the reduction process. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:1326 / 1334
页数:9
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