| Abstract: | Thermical Decomposition and Sublimation of NiI2 In a membran manometer the thermical decomposition and the sublimation of NiI2 was measured and in ampuls the sublimation of NiI2 studied. From the total pressure and the sublimation pressure the enthalpy of formation ΔH°(f,NiI2,f,298) = ?20 ± 2 kcal/mole and ΔH°(f,NiI2,g,298) = +31.2 ± 5 kcal/mole was derived. The entropy dates are: S°(NiI2,f,298) = 35 ± 2 cl, S°(NiI2,g,298) = 80 ± 1 cl and S°(Ni2I4,g,298) = 128 ± 3 cl respectively. The Ni formed with NiI2 an eutectical system. |
