The solid-liquid equilibria of the. ternary system H2O-Fe(NO3)(3)-Co(NO3)(2) were studied by using a synthetic method based on conductivity measurements. Two isotherms were established at 0 and 15 degrees C, and the stable solid phases which appear are the iron nitrate nonahydrate (Fe(NO3)(3)center dot 9H(2)O), the iron nitrate hexahydrate (Fe(NO3)(3)center dot 6H(2)O), the cobalt nitrate hexahydrate(Co(NO3)(2)center dot 6H(2)O) and the cobalt nitrate trihydrate (Co(NO3)(2)-3H(2)O). (C) 2007 Elsevier B.V. All rights reserved.