Structural and Physical Properties of the Solid Solution Series Bi4V2-xNixO11-1.5x

The compounds Bi4V2-xNixO11-1.5x,x0.35, were prepared by solid state reaction. Thephase is present at room temperature forx0.20 and thephase is stable for greater Ni concentrations. The oxygen ion vacancies in thex=0.30 phase exist in the equatorial plane of the V/Ni coordination octahedron. Thex=0.30 phase is paramagnetic. As the Ni concentration decreases the magnetic spin structure gradually changes to that of an amorphous spin glass. At 833 K the ionic conductivity=3.16×10-2S cm-1. The ionic conductivity decreases with increasing Ni concentration.