Abstract
A solubility limit of ≈6 mol% PuO 2 in sodium disilicate (Na 2O · 2 SiO 2) glass has been determined. Magnetic susceptibility measurements on these glasses yield approximate Curie—Weiss behavior, in contrast to the temperature-independent susceptibility of crystalline PuO 2. This result is interpreted to indicate that the local site symmetry around the Pu ion in the sodium disilicate glass is very different than in crystalline PuO 2. The effective paramagnetic moments determined from the temperature dependence of the susceptibility are found to be consistent with calculated free-ion values based on the most likely 5f electron configurations.
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