Structure and magnetic properties of AgFeP2O7

Abstract AgFeP 2 O 7 has been synthesized by flux crystallization and characterized by single crystal and powder X-ray diffraction (sp. gr. P 2 1 / c , a =7.3298(2), b =7.9702(2), c =9.5653(2) A, β =111.842(1)°, V =518.68(2) A 3 ) and FTIR-spectroscopy. The structure is composed of isolated iron octahedra and phosphate tetrahedra interconnected into 3D network with hexagonal channels, where silver counter-ions are located. The magnetic behavior of the compound approaches the Curie–Weiss equation with a Weiss constant θ =−165.9 K indicating strong antiferromagnetic interaction between iron(III) ions.