LAJMI, Besma; HIDOURI, Mourad; BEN HAMMOUDA, Abdel-Karim; WATTIAUX, Alain; FOURNÈS, Léopold; DARRIET, Jacques; BEN AMARA, Mongi

doi:10.1016/j.matchemphys.2008.07.064

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

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

BEN HAMMOUDA, Abdel-Karim

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Materials Chemistry and Physics. 2009, vol. 113, n° 1, p. 372-375

Elsevier

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Single crystals of a new iron monophosphate K3Fe(PO4)2 were synthesized by the flux method and characterized by X-ray diffraction, magnetic susceptibility and Mössbauer spectroscopy. The compound crystallizes in the monoclinic system with the space group P21/n and the parameters a = 9.598(3) Å, b = 11.086(2) Å, c = 15.462(3) Å, β = 90.30(2)° and Z = 8. The crystal structure can be described in terms of [Fe2P4O17]∞ chains of FeO6 octahedra and PO4 tetrahedra sharing corners and edges. Adjacent chains are linked through common corners to form a three-dimensional framework containing crossing tunnels where the K+ ions are located. The magnetic measurements showed the compound to be antiferromagnetic with TN ≈ 9 K. The Mössbauer spectroscopy confirmed the occurrence of octahedral Fe3+ ions in a high spin state.< Leer menos

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Inorganic compounds

Crystallization

Mössbauer spectroscopy

Magnetic properties

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Synthesis and structural study of a new iron phosphate K3Fe(PO4)2

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