Аннотация:An attempt was made (based on the very low vapor pressure (10 Pa) of U >2300 K) to purify the U metal based on the phase transition of the solid to the liq. state using a crucible free zone melting process. After 2 passes of the melted zone, the content of trace impurities on the av. in the U sample decreased 2-fold (from 0.8 to 0.4 at.%).