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The Mg-Sb phase diagram in [Massalski2] was redrawn from [1984Nay].
[1990Oka] pointed out an unlikely feature in this phase diagram, i.e., the metastable melting point of αMg3Sb2 cannot be defined uniquely when extrapolated from the liquidus curves on the Mg-rich and Sb-rich side unless thermodynamically unlikely sudden change of curvature is introduced in these liquidus curves.
Figure 1 shows the Mg-Sb phase diagram calculated by [2009Pal]. Naturally, the problem described above is solved in this figure.
Table 1 shows Mg-Sb crystal structure data.
References
A.A. Nayeb-Hashemi and J.B. Clark, The Mg-Sb (Magnesium-Antimony) System, Bull. Alloy Phase Diagr., 1984, 5(6), p 579-584
H. Okamoto and T.B. Massalski, Thermodynamically Improbable Phase Diagrams, J. Phase Equilib. Diffus., 1990, 12(2), p 148-168
M. Paliwal and I.H. Jung, Thermodynamic Modeling of the Mg-Bi and Mg-Sb Binary Systems and Short-Range-Ordering Behavior of the Liquid Solutions, Calphad, 2009, 33, p 744-754
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Okamoto, H. Mg-Sb (Magnesium-Antimony). J. Phase Equilib. Diffus. 31, 574 (2010). https://doi.org/10.1007/s11669-010-9784-7
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DOI: https://doi.org/10.1007/s11669-010-9784-7