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High-purity Nd, Pr, and didymium (cerium-free mixture of light rare-earth elements) were prepared by electrolysis of oxides in medium consisting of respective rare-earth fluorides and lithium fluoride; metals were electrodeposited in liquid state and collected as nodules on skull of frozen electrolyte; cells were operated from 1000 to 1100 C; analysis of typical didymium metal nodules showed twofold enrichment in Nd dymium and Pr over their respective concentrations in cell feed; La content of metal was about one-half its content in oxide.