HIDOURI, Mourad; LAJMI, Besma; WATTIAUX, Alain; FOURNÈS, Léopold; DARRIET, Jacques; AMARA, Mongi B.

doi:10.1016/j.jallcom.2006.10.119

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

HIDOURI, Mourad
Laboratoire de Chimie Structurale des Matériaux, Département de Chimie

LAJMI, Besma
Laboratoire de Chimie Structurale des Matériaux, Département de Chimie

WATTIAUX, Alain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

Langue

Article de revue

Ce document a été publié dans

Journal of Alloys and Compounds. 2008, vol. 450, n° 1-2, p. 301-305

Elsevier

Résumé en anglais

A new mixed-valence iron phosphate Na1.25Mg1.10Fe1.90(PO4)3 has been synthesized as single crystals by a flux technique and its structure has been refined from X-ray data to a residual R1 = 0.032. The compound crystallizes in the monoclinic space group C2/c with the parameters: a = 11.7831(3) Å, b = 12.4740(3) Å, c = 6.3761(2) Å, β = 113.643(2)° and Z = 4. The structure belongs to the alluaudite structural type, and thus it obeys to the X(2)X(1)M(1)M(2)2(PO4)3 general formula. The X(2) and X(1) sites are occupied by sodium while the M(1) and M(2) sites feature a statistical distribution of iron and magnesium. Additional information about the cation distribution has been extracted from a Mössbauer spectroscopy study which confirmed the mixed valency of the compound. A magnetic susceptibility study has also been undertaken and has shown the compound to be antiferromagnetic with a Neel temperature of about 35 K.< Réduire

Mots clés

Alluaudite

Magnetic measurements

Phosphate

X-ray diffraction

Métadonnées

Licence d’utilisation du document

Structural investigation of the alluaudite-like mixed-valence iron phosphate: Na1.25Mg1.10Fe1.90(PO4)3

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés

DOI

Origine

Unités de recherche