Centimeter-sized single crystals of pure and Er-doped KPb2Cl5 were successfully grown by the Bridgman-Stockbarger method using silica ampoules sealed under HCl gas. The phase transition that occurs at 255 degrees C (528.15 K) was characterized by differential scanning calorimetry and found not to entail mechanical breakdown of the crystals. The KPb2Cl5 volumic mass and specific heat functions were measured from similar to 700 to 760K and similar to 120 to 760K, respectively. An updated Ellingham diagram for chlorides aimed at choosing the crucible material, synthesis and crystal growth atmosphere, and starting products is proposed. (c) 2005 Elsevier B.V. All rights reserved.