The Ni-S phase diagram in [Massalski2] was redrawn from [1991Sin].

Figure 1 shows the Ni-S phase diagram determined by thermodynamic calculations by [2004Wal]. In the diagram of [1991Sin], β1 and β2 phases existed in the β phase field in Fig. 1. The presence or absence of these phases must be confirmed.

Fig. 1
figure 1

Ni-S phase diagram

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Ni-S crystal structure data are shown in Table 1.

Table 1 Ni-S crystal structure data
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