STRUCTURAL AND PHYSICAL PROPERTIES OF THE SOLID SOLUTION SERIES Bi4V2-xNixO11-1.5x

摘要

The compounds Bi4V2-xNixO11-1.5x,x less than or equal to 0.35, were prepared by solid state reaction. The alpha phase is present at RT for x less than or equal to 0.20, and the gamma phase is stable for greater Ni concentrations. The O ion vacancies in the x=0.30 phase exist in the equatorial plane of the V/Ni coordination octahedron. The x=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 equals 3.16 times 10-2 S cm-1. The ionic conductivity decreases with increasing Ni concentration. 23 refs.