CATION DISTRIBUTION IN FE3(1-DELTA)O4 AND LOW-LEVEL DOPED FE3-XMXO4, M=TI, ZN, AL

Systematic magnetic saturation moment and electrical resistivity measu rements of the Fe3(1-delta)O4 and Fe3-xMxO4 (M = Ti, Zn, Al) are prese nted. Cation distributions for low level doping are proposed and compo sitional dependencies of the Verwey transition temperature are determi ned. The latter show striking similarities in their dependence on cati on vacancies and dopant concentration for any extraneous cations. Thes e data are the basis for the analysis of the correlation between the p resented cations distributions and the Verwey transition.