Pressure of the Saturated Vapor of Nickel at High Temperatures

Two series of measurements of the saturated vapor pressure of crystalline and liquid nickel are carried out in the temperature range of $1270$–$1896$ K using the integral version of the effusion method and Knudsen mass spectrometry. The enthalpy of sublimation of $\text{Ni}$ at $0$ K is calculated from the measurement results in accordance with the second $\Delta_sH^0_0(\text{II})$ and the third $\Delta_sH^0_0(\text{III})$ laws of thermodynamics. Good agreement between the vapor pressure values, determined by different methods under different experimental conditions, makes possible their joint treatment for crystalline and liquid nickel and leads one to recommend the value of $\Delta_sH^0_0 = 425.3 \pm 2.0$ kJ/mol. The results obtained are compared with the available data of other authors.