Фазовая диаграмма системы Hg-Pr

К оглавлению: Другие диаграммы (Others phase diargams)


Hg-Pr (Mercury-Praseodymium) C. Guminski The hypothetical Pr-Hg phase diagram at constrained pressure is redrawn from [ Moffatt]. In the Pr-rich region, the equilibrium lines are drawn according to the experimental work of [71Gri]. The central part of the diagram is presumed to be analogous to the La-Hg system at constrained pressure. The decomposition temperature of Pr11Hg45 at normal pressure is below the melting point of Hg; therefore, it is presumed that, at constrained pressure, this temperature is not as elevated as in [Moffatt]. [79Mer] established a more correct formula for PrHg4 as Pr11Hg45. PrHg is the most stable compound; its thermal decomposition temperature was found to be 680 C in undefined conditions and 570 C at normal pressure. 51Ian: A. Iandelli and R. Ferro, Atti Accad. Naz. Lincei, Rend. Cl. Sci. Fis. Mat. Nat., 8, 48-52 (1951) in Italian. 58Ian: A. Iandelli, Physical Chemistry of Metallic Solutions and Intermetallic Compounds, Vol. 1, Paper 3F, Her Majesty›s Stationery Office, London (1959). 71Gri: R.B. Griffin and K.A. Gschneidner, Metall. Trans., 2, 2517-2524 (1971). 79Mer: F. Merlo and M.L. Fornasini, J. Less-Common Met., 64, 221-231 (1979). 89Gum: C. Guminski, J. Mater. Sci., 24, 2661-2676 (1989). Submitted to the APD Program. Complete evaluation contains 1 figure, 4 tables, and 23 references. Special Points of the Pr-Hg System