A New Nasicon-Type Phosphate Co0.5Ti2(PO4)3: I. Elaboration, Optical and Magnetic Properties

Author: Olazcuaga R.   Dance J.M.   Flem G.L.   derouet J.   Beaury L.   Porcher P.   Bouari A.E.   Jazouli A.E.  

Publisher: Academic Press

ISSN: 0022-4596

Source: Journal of Solid State Chemistry, Vol.143, Iss.2, 1999-03, pp. : 224-229

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Abstract

A new cobalt titanium monophosphate has been prepared by low temperature method. It crystallizes with the Nasicon-type structure. The indexation of the X-ray diffraction pattern is consistent with the R3 or the R32 space groups. The atomic arrangement is a three-dimensional framework formed by PO4 tetrahedra sharing corners with TiO6 octahedra. Co2+ is located in half of the antiprism M(1) sites in a centered (R3) or off- centered (R32) position. The optical, EPR and magnetic data can account for a pure ionic Co–O bond.