The Mg-Sm phase diagram in [Massalski2] was redrawn from [1989Sac]. The phase relationships among Sm allotropes were uncertain. Figure 1 shows the Mg-Sm phase diagram calculated by [2008Jia] based primarily on the work of [1989Sac]. Possible relationships among Sm allotropes are shown.

Fig. 1
figure 1

Mg-Sm phase diagram

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Mg-Sm crystal structure data given in Table 1 were adopted from [Massalski2] with the composition ranges modified according to [2008Jia].

Table 1 Mg-Sm crystal structure data
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