"Formation of the ST12 phase in nanocrystalline Ge at ambient ...
The formation of ST12-Ge is typically associated with high pressure, yet the nucleation and coalescence of this phase can be observed by in situ transmission electron microscopy at low pressure and at temperatures well below 200 degrees C, and can... Abstract Amorphous nanophase germanium can crystallize into a high-energy tetragonal phase (Ge-III/ST12) upon thermal annealing, particularly when prepared by the naphthalide-mediated reduction of GeCl4 and subsequent treatment with t-BuMgCl.
