Calorimetry measurements have been performed as a function of temperature for size-selected Gan-1Al+ clusters with n = 17, 19, 20, 30-33, 43, 46, and 47. Heat capacities determined from these measurements are compared with previous results for pure Ga-n(+) clusters. Melting transitions are identified from peaks in the heat capacities. Substituting an aluminum atom appears to have only a small effect on the melting behavior. For clusters that show melting transitions, the melting temperatures and latent heats for the Gan-1Al+ clusters are similar to those for the Ga-n(+) analogs. For Ga-n(+) clusters that do not show first-order melting transitions (n = 17, 19, and 30) the Gan-1Al+ analogs also lack peaks in their heat capacities. The results suggest that the aluminum atom is not localized to a specific site in the solid-like Gan-1Al+ clusters.