Abstract
Atomic-vacancy ordering was achieved via prolonged annealing of nanocrystalline nonstoichiometric titanium monoxide TiOy possessing the average crystal size of ∼30±10nm in vacuo in the temperature range of 300–1200K. The XRD and HRTEM data revealed the ordering based on the orthorhombic super-structures of M2X3 and M3X2 types (space group Immm), which are derived from the B1 structure of disordered cubic phase of γ-TiO.
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