H2O + Fe(NO3)3 + Ni(NO3)2 ternary system isotherms at 0 °C and 30 °C

H2O + Ni(NO3)2 binary system were investigated in the temperature range from −25 °C to 55 °C. The solid–liquid equilibria of the ternary system H2O + Fe(NO3)3 + Ni(NO3)2 were studied using a synthetic method based on conductivity measurements. Tow isotherms were established at 0 °C and 30 °C, and the appearing stable solid phases are iron nitrate nonahydrate (Fe(NO3)3·9H2O), iron nitrate hexahydrate (Fe(NO3)3·6H2O), nickel nitrate hexahydrate (Ni(NO3)2·6H2O) and nickel nitrate tetrahydrate (Ni(NO3)2·4H2O).

► We established two isotherms at 0 °C and 30 °C in the ternary system H2O + Fe(NO3)3 + Ni(NO3)2. ► The solid phases identified are: Fe(NO3)3·9H2O, Fe(NO3)3·6H2O, Ni(NO3)2·6H2O and Ni(NO3)2·4H2O. ► We established the diagram of solid–liquid equilibrium of binary system H2O + Ni(NO3)2. ► The solid species appeared in binary system were nona-, hexa-, tetra- and dihydrate of nickel nitrate.