Calculation of Cp(T) for liquid Li/Pb alloys from experimental ρ(T) and (δp/δT)sdata

The density rho and the adiabatic variation of temperature T with pressure p, ( delta T/ delta p) s , have been measured for the whole concentration range of liquid Li/Pb alloys and for a temperature range of 200 to 700 K (depending on composition) above the liquidus temperature T L . The heat capacity C p calculated from these data exhibits a pronounced peak at the composition Li 4 Pb where at T L it exceeds the ideal C p i by an excess value C p xs of about 0.8 C p i . Linear variation of C p with T was only observed for pure liquid Pb. Strongly bent curves with more or less pronounced minima were observed for the other compositions, including pure liquid Li. The C p xs of liquid Li 4 Pb compares well with a value calculated from neutron diffraction data by Ruppersberg and Schirmacher (1984).