The equilibrated grain boundary groove shapes of solid Sn solution in equilibrium with the Sn-Ag-In liquid have been observed from quenched sample. The Gibbs-Thomson coefficient, solid-liquid interfacial energy and grain boundary energy of solid Sn solution have been determined. The thermal conductivity values for solid Sn solution (Sn-2.1 at.%In) and eutectic solid (Sn-4.4 at.%Ag-2.1 at.%In) and the thermal conductivity ratio of eutectic liquid phase to eutectic solid for Sn-4.4 at.%Ag-2.1 at.%In alloy at the melting temperature have also been measured with a radial heat flow apparatus and Bridgman type growth apparatus, respectively. (C) 2010 Elsevier B.V. All rights reserved.