Фазовая диаграмма системы Hg-Mg

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Hg-Mg (Mercury-Magnesium) A.A. Nayeb-Hashemi and J.B. Clark The general characteristics of the assessed Mg-Hg equilibrium phase diagram are well established [15Cam, 22Bec, 30Dan]. [66Cla] reported that Mg-Hg compounds were superconductors. In the assessed diagram, the (Mg) solidus and solvus are shown as dashed lines because of uncertainty in the reported data for these lines. However, because of the precision of the lattice parameter measurements of [50Bus], the maximum solid solubility is indicated to be ~1.2 at.% Hg. The solid solubility of Mg in (Hg) appears to be negligible. [22Bec] reported two metastable eutectic reactions: L = Mg2Hg + MgHg and L = ( Mg) + Mg5Hg2, but [Hansen] reported only the second reaction. The occurrence of L = MgHg + Mg2Hg necessitates suppression of two eutectic reactions, L = MgHg + Mg5Hg3 and L = Mg2Hg + Mg5Hg3, and the congruently melting Mg5Hg3. The suppression of three reactions with slow cooling is not likely to occur. 15Cam: L. Cambi and G. Speroni, Atti Accad. Naz. Lincei, Rend. Cl. Sci., Fiz., Mat. Nat., 24(1), 734-738 (1915). 22Bec: R.P. Beck, Rec. Trav. Chim., 41, 353-399 (1922) in French. 30Dan: P.T. Daniltschenko, Zh. Russ. Fiz. Khim. Obsh., 975-988 (1930) in Russian. 41Bra: G. Brauer and R. Rudolph, Z. Anorg. Chem., 248, 405-524 (1941) in German. 47Bra: G. Brauer, H. Nowotny, and R. Rudolph, Z. Metallkd., 38, 81-84 (1947) in German. 50Bus: R.S. Busk, Trans. Metall. Soc. AIME, 188, 1460-1464 (1950). 66Cla: T. Claeson and H.L. Luo, J. Phys. Chem. Solids, 27, 1081-1085 (1966). Published in Phase Diagrams of Binary Magnesium Alloys, 1988. Complete evaluation contains 1 figure, 7 tables, and 24 references. Special Points of the Mg-Hg System