A probable scenario of the liquid-liquid phase transition in tin tetraiodide

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The present study has begun to primarily elucidate a probable transition scenario between the two liquid states discovered intin tetraiodide. In the period of research, not only this purpose was achieved, but also the following two important findings were unvalued: i) our experimental study revealed that the liquid states are indeed thermodynamically stable phases characterizedby different densities, and ii) the polyamorphism observed in tin tetraiodide was theoretically identified with the one found in water and its related systems characterized bythe open tetrahedral network structure. Although the liquid-liquid critical point ofwater is considered to be located below the homogeneous nucleation temperature, and istherefore never reached, the critical point in liquid tin tetraiodide lies in an experimentally accessible region. The latter fact then opens up a new path toward a new type of critical phenomena.