Syntheses and Characterizations of Three Bismuth(III)-Containing Mixed-Metal Phosphates:Ba₂Bi₂M^II(PO₄)₄(M= Mn, Ni, Cu)

Abstract

We present here the syntheses, crystal structures, and characterizations of three new mixed-metal phosphate of Ba 2 Bi 2 M II (PO 4 ) 4 (M = Mn, Ni, Cu), which synthesized by traditional solidstate reactions for the first time. Three title compounds crystallize in the orthorhombic system with space group Pnma, their structure can be described as adjacent zig-zag linear structure of [MP 4 O 16 ] 1 along [100] further are connected by BiO 6 dis-torted octahedra to form 3D framework, where the Ba 2 + are located in tunnels running along the [001] direction. The Bi 3 + cations, which are surrounded by six oxygen atoms, show strong stereoactivities of 6 s 2 lone pair. The results of magnetic property measurements evidence on the antiferroagnetic properties of Ba 2 Bi 2 Mn(PO 4 ) 4 and ferromagnetic properties of Ba 2 Bi 2 M II (PO 4 ) 4 (M = Ni, Cu).