We have studied the specific heat C_p(T), thermal expansion \alpha (T), thermal conductivity \kappa , thermoelectric power {ITALIC S} and magnetoresistance \Delta \rho /\rho of the heavy-fermion ferrimagnet UCu₅Sn. The anomalies observed in the C_p(T)-, \alpha (T)- and \Delta \rho /\rho (T)-dependencies confirm the existence of long-range magnetic order. \Delta \rho /\rho is negative in the investigated temperature and magnetic field ranges. The fitting of the magnetic specific heat in the temperature range 10--40 K gives \gamma _ord = 78 mJ/moleK², \beta = 0.5 mJ/moleK⁴ and \Delta /k_B = 21 K. The effective Grueneisen parameter reaches a value of 4.7 at low temperatures, supporting the strongly correlated electron nature of this material. The thermoelectric power shows a maximum around 24 K, which might be related to either the Kondo effect or the phonon drag process. Below 100 K, the phonon contribution \kappa _ph dominates the thermal conductivity. The reduced Lorenz number \kappa \rho /L₀T shows a broad peak at \sim 10 K. This behavior might be explained by a dominant phonon scattering process off the U magnetic moments.

PACS numbers: 71.27.+a