“…In his paper [43], Mn-Sn phase diagram was reported in two figures; Mn 3 Sn phase was treated as stoichiometric and in the other figure Mn 3 Sn modelled as a solid solution. Moreover, the calculated activity at 1000°C of Miettinen [43] could not produce good fit with experimental data of Eremenko et al [47]. According to Okamoto's review [48] on the Mn-Sn phase diagram, the stable phases in this system are; (αMn), (βMn), (γMn), (δMn), MnSn 2 , (Mn (2−x) Sn), Mn 3 Sn 2 , (Mn 3 Sn) and β Sn.…”