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The results of measurements of the solubility of UF4 and ThF4 in the eutectic 46.5LiF–11.5NaF–42KF are presented. Isothermal saturation of the salt melt by the experimental compounds is used. The UF4 and ThF4 solubility in the experimental salt system is experimentally shown to be high (45 and 41 mol. %, respectively, at 700°C) and temperature-dependent in the interval 550–700°C.
The temperature dependence of the PuF3, AmF3, CeF3, and NdF3 solubility in the eutectic 46.5LiF–11.5NaF–42KF was measured in the interval 550–700°C. Anhydrous plutonium, americium, cerium and neodymium trifluorides were synthesized. The method of isothermal saturation with dissolution of pressed PuF3, AmF3, CeF3, and NdF3 pellets in melt in an inert argon atmosphere was used for the measurements....
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