Abstract

The electrical conductibility of the UBr 4 uranium compound was measured, for both solid and liquid state, on a wide temperature range. Results obtained for the solid near the melting point suggest the occurence of a pre-melting effect. The fusion thermograms obtained from classical differential thermal analysis, with the same material, exhibited too an anomaly suggesting that fusion joins with another phenomenon. A more sensitive thermal method—differential enthalpic analysis—allowed to precise this phenomenon, never mentioned as far as we know, and to determine the premelting and melting temperatures as well as the enthalpy associated with the global effect.

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