Issue 5, 2003
From the journal:

Journal of Materials Chemistry

Synthesis, structure and magnetic behaviour of the danalite family of minerals, Fe8[BeSiO4]6X2 (X = S, Se, Te)

Jennifer A. Armstrong,a   Sandra E. Dann,*a   Klaus Neumannb  and  Jose F. Marcoc  

* Corresponding authors

a Department of Chemistry, Loughborough University, Leicestershire, UK

b Department of Physics, Loughborough University, Leicestershire, UK

c Instituto de Química Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain

Abstract

Danalite, the iron sulfide member of the helvite group of minerals, has been synthesised for the first time. Synthetic analogues of danalite, where selenium and tellurium replace sulfur, have also been prepared. These materials crystallise with the primitive cubic sodalite unit cell and an ordered Be–Si framework in the space group P[4 with combining macron]3n. The structures have been refined using powder X-ray diffraction data in order to delineate the dimensions of the Fe4X units present within the sodalite cage and the intercage separation of these units. Mössbauer data and magnetic measurements indicate that despite the divalent iron ions being occluded in the high spin state and the short intercage separation between the Fe4X units, no long range magnetic interactions occur down to 4.2 K.

Graphical abstract: Synthesis, structure and magnetic behaviour of the danalite family of minerals, Fe8[BeSiO4]6X2 (X = S, Se, Te)

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Article information

DOI
https://doi.org/10.1039/B210090H
Article type
Paper
Submitted
14 Oct 2002
Accepted
03 Mar 2003
First published
13 Mar 2003

J. Mater. Chem., 2003,13, 1229-1233

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Synthesis, structure and magnetic behaviour of the danalite family of minerals, Fe8[BeSiO4]6X2 (X = S, Se, Te)

J. A. Armstrong, S. E. Dann, K. Neumann and J. F. Marco, J. Mater. Chem., 2003, 13, 1229 DOI: 10.1039/B210090H

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