Magnetic Analysis of the Uranium-Oxygen System

Abstract

Magnetic susceptibility measurements have been carried out on the uranium-oxygen system in the composition range of U${\mathrm{O}}_2$ to U${\mathrm{O}}_{2.67}$. The existence of an antiferromagnetic transition at compositions close to stoichiometric U${\mathrm{O}}_2$ which had been previously reported by the authors has been confirmed. The data make it possible to define clearly the phase limits of the U${\mathrm{O}}_2$ and ${\mathrm{U}}_3$ ${\mathrm{O}}_8$ structures and to determine unambiguously that the excess oxygen ions in the nonstoichiometric salts occupy interstitial positions in the lattice.