Figure 4
From: Atomic-scale analysis of cation ordering in reduced calcium titanate
Study of the temperature dependence of the superstructure. The HRTEM images show specific region in CaTi2O4 projected along [001] at (a) 20 °C, (b) 400 °C and (c) 500 °C, respectively. The top insets with black background are corresponding experimental SAED patterns, and the lower inset with white background is simulated SAED pattern based on the original atomic model. (d) The original model projected along [001] and [010]. The orange and green lines indicate different bond lengths in the puckered double Ti layer. The Ti double layers covered by blue bands in the top model indicate the existence of Ti vacancies in alternating Ti double layers.
