The Sc-Th phase diagram in [Massalski2] was updated by [1991Oka] based on the work of [1990Ter].

Figure 1 shows the Sc-Th phase diagram calculated by [2009Liu]. The experimental phase boundary data used were essentially taken from [1990Ter]. Accordingly, the diagrams of [1991Oka] and [2009Liu] are similar. The most significant difference is found around the minimum melting point. In the phase diagram of [1991Oka], the liquidus curve showed sudden curvature change, which is unlikely. The shape shown in Fig. 1 seems to be more normal.

Fig. 1
figure 1

Sc-Th phase diagram

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Table 1 shows Sc-Th crystal structure data.

Table 1 Sc-Th crystal structure data
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