Preparation and properties of sodium iron orthooxomolybdates, NaxFey(MoO4)z

被引：7

作者：

Ehrenberg, Helmut

Muessig, Elke

Bramnik, Kirill G.

Kampe, Philip

Hansen, T.

机构：

[1] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

[2] Tech Univ Darmstadt, Ernst Berl Inst, D-64287 Darmstadt, Germany

[3] Inst Laue Langevin, F-38042 Grenoble 9, France

来源：

SOLID STATE SCIENCES | 2006年 / 8卷 / 07期

关键词：

sodium-iron molybdates; anisotropic thermal expansion; thermal stability; antiferromagnetic ordering;

D O I：

10.1016/j.solidstatesciences.2006.03.001

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Five different crystalline phases are established in the quaternary system Na-Fe-Mo-O with isolated MoO4 tetrahedra: NaFe(MoO4)(2), Na3Fe2(MoO4)(3), alpha- and beta-NaFe2(MoO4)(3) and NaFe4(MoO4)(5). The optimized conditions for sample preparation are described together with structural analyses by X-ray and neutron powder diffraction. The observed crystal structures are compared with known structure types. The high-temperature behaviour, thermal expansion, decomposition or congruent melting, is reported together with some preliminary characterisation of oxygen release as requested for catalytic activity in partial oxidation of hydrocarbons. Magnetic properties and antiferromagnetic ordering have been studied by magnetisation measurements and neutron, diffraction. (c) 2006 Elsevier SAS. All rights reserved.

引用

页码：813 / 820

页数：8

共 28 条

[1] X-RAY AND NEUTRON-DIFFRACTION STUDIES IN SPINEL FE2MOO4 [J].