Фазовая диаграмма системы Er-Hg

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Er-Hg (Erbium-Mercury) C. Guminski The assessed Er-Hg phase diagram at 0.101 MPa pressure is based on that of [ 66Kir], with the addition of Er11Hg45 (first reported as ErHg4 by [79Ian]), a phase with stability probably extending to about 150 C. A speculative diagram was prepared by [Moffatt] for a pressure sufficient to retain all phases in condensed form, of which the central portion is presumed to be analogous to La-Hg and Pr-Hg at constrained pressure. The stability ranges of Er-Hg compounds at constrained pressure were extended for about 500 C and a few percent solubility of Hg in (Er) was postulated; however, the form of the diagram is doubtful. The Er-Hg system consists of (1) the liquid, L; (2) the (Er) solid solution, with an unknown, small solid solubility of Hg; (3) four intermetallic compounds-Er11Hg45, ErHg3, ErHg2, and ErHg, with narrow homogeneity ranges; (4) the (Hg) phase, with a very low solid solubility of Er; and (5) the gas, g. In the temperature range -100 to +20 C, the mutual solid solubilities of Er and Hg were found to be below 0.01 at.%. 66Kir: H.R. Kirchmayr and Lugscheider, Z. Metallkd., 57, 725-728 (1966) in German. 79Ian: A. Iandelli and A. Palenzona, in Handbook on the Physics and Chemistry of Rare Earths, K.A. Gschneidner, Jr. and L. Eyring, Ed., North-Holland, Amsterdam, 1-54 (1979). 79Mer: F. Merlo and M.L. Fornasini, J. Less-Common Met., 64, 221-231 (1979). Submitted to the APD Program. Complete evaluation contains 1 figure, 3 tables, and 11 references. Special Points of the Er-Hg System