On the magnetic anisotropy of caesium hexachlorouranate(IV)

Abstract

The magnetic susceptibility and anisotropy of the hexagonal salt Cs₂UCl₆ were measured from 80 to 300 K and found to be essentially independent of temperature. The results were interpreted using a parameterized crystal field model. k was found to be 0.93, but the L C₃-U-Cl deduced does not agree with the value known from the structure for any reasonable range of the crystal field parameter p₂. It is deduced that the next state, T₄(O_h), above the ground T₁ state should be split by 50 cm^-l. This is in fair agreement with the value observed from the spectrum, 82 cm^-1.