The Tl2Te-In2Te3 solid system was studied using emf measurement of concentration cells to verify the phase diagram for the system published earlier by other authors. Partial molar thermodynamic functions of thallium at 443 K were determined for the ternary phases of this system. The study produced substantial evidence corroborating the formation of a new compound not found earlier. (C) 2007 Elsevier Ltd. All rights reserved.