Preparation of Anhydrous Uranium Tetrachloride and Measurements on Its Magnetic Susceptibility

Abstract

The reaction of UO₂ with CCl₄ vapor was carried out in a vacuum of 10_-5 mmHg at 500°C in order to prepare UCl₄ of high purity. The lattice parameters were calculated from X-ray analysis to be a₀=8.278±0.002, c₀=7.460±0.009. The product thus ohtained was verified by chemical and X-ray analyses to be of anhydride form. The magnetic susceptibility was measured over the temperature range from liquid N₂ to liquid He temperature, which revealed a deviation from the straight 1/X-T relation toward lower temperature.