Effects of the source temperature on the formation of a metastable HgI2 phase and consequences for the nucleation and growth behaviors in PVT ampoules

By examining the nucleation and growth phenomena for HgI2 crystals in physical vapor transport ampoules with a variation of temperatures of the source powder side Tsou and of the crystal growth side Tcry both are near its solid-solid phase transition temperature Tc=127°C, our experimental results reveal that under Tcry