The magnetic susceptibilities of UCl5, UCl3, and solutions of UCl3in LaCl3have been measured in the temperature range from 14deg;K to 300deg;K. The results are presented graphically and their general form is discussed. The susceptibility of UCl3apparently undergoes an antiferromagnetic transition just above the boiling point of H2. As UCl3is diluted with LaCl3the behavior of the magnetic susceptibility approaches closely that of Nd(C2H5SO4)3middot;9H2O. The magnetic behavior of UCl3is consistent with that expected for an ion with three unpairedfelectrons.
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