Heats of formation of (U,Mo)Al3 and U(Al,Si)3

The heats of formation of (U,Mo)Al3 intermetallic compounds were obtained by measuring the reaction heats of U–Mo/Al dispersion samples by differential scanning calorimetry. Based on literature data for the reaction heats of U3Si/Al and U3Si2/Al dispersion samples, the heats of formation of U(Al,Si)3 as a function of the Si content were calculated. The heat of formation of (U,Mo)Al3 becomes less negative as the Mo content increases. Conversely, the heat of formation of U(Al,Si)3 becomes more negative with increasing Si content.