Issue 4, 2001

Abstract

Synthetic analogues of francisite, a mineral of complex formula Cu3Bi(SeO3)2O2X with X = Cl, Br, I, have been obtained by solid state reaction. Contrary to the previous structure description, the framework can be better described as formed of copper(II)–oxygen layers linked together in the [001] direction by long bismuth–oxygen bonds. These layers are formed by a hexagonal network of [CuO4] square plane sharing apices whose geometry is reminiscent of a Kagomé type lattice. Preliminary magnetic susceptibility measurements performed on the X = Cl and Br compounds have revealed ferromagnetic-like behaviour below Tc ≈ 24 K. Linear birefringence and X-band Electron Spin Resonance (ESR) data are also presented.

Graphical abstract: Syntheses, crystal structures and magnetic properties of francisite compounds CuBi(SeO)OX (X = Cl, Br and I)

Supplementary files

Article information

Article type
Paper
Submitted
02 Oct 2000
Accepted
08 Jan 2001
First published
16 Feb 2001

J. Mater. Chem., 2001,11, 1152-1157

Syntheses, crystal structures and magnetic properties of francisite compounds Cu3Bi(SeO3)2O2X (X = Cl, Br and I)

P. Millet, B. Bastide, V. Pashchenko, S. Gnatchenko, V. Gapon, Y. Ksari and A. Stepanov, J. Mater. Chem., 2001, 11, 1152 DOI: 10.1039/B007920K

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