Elaboration and Characterisation of two new Iron Titanium Phosphates Fe0.5TiO(PO4) and Fe0.5Ti2(PO4)3

S. BENMOKHTAR; A. EL JAZOULI; J. P. CHAMINADE; P. GRAVEREAU; A. WATTIAUX; L. FOURNES; J. C. GRENIER

doi:10.3363/prb1992.15.0_140

Elaboration and Characterisation of two new Iron Titanium Phosphates Fe_0.5TiO(PO₄) and Fe_0.5Ti₂(PO₄)₃

S. BENMOKHTAR, A. EL JAZOULI, J. P. CHAMINADE, P. GRAVEREAU, A. WATTIAUX, L. FOURNES, J. C. GRENIER

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JOURNAL FREE ACCESS

2004 Volume 15 Pages 140-142

DOI https://doi.org/10.3363/prb1992.15.0_140

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Abstract

Two new phosphates Fe_0.5TiO(PO₄) and Fe_0.5Ti₂(PO₄)₃ have been prepared and characterised by X-ray diffraction, Mössbauer spectroscopy and magnetic measurements. Fe_0.5TiO(PO₄) is isostructural to the oxyphosphate Ni_0.5TiO(PO₄) while Fe_0.5Ti₂(PO₄)₃ belongs to the Nasicon family. Their structures are formed by a 3D framework of TiO₆ octahedra and PO₄ tetrahedra linked by corners. Fe²⁺ ions occupy isolated octahedral cavities situated between two TiO₆ octahedra. The magnetic and Mössbauer parameters are typical of Fe²⁺ ions in octahedral sites with high spin configuration t_2g⁴e²_g.

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