Self-adapted clustering of solute atoms into a confined two-dimensional prismatic platelet with an ellipse-like quasi-unit cell

Xie, H.; Bai, J.; Pan, H.; Pang, X.; Ren, Y.; Sun, S.; Wang, L.; Zhao, H.; Liu, B.; Qin, G.

doi:10.1107/S205225251801415X

Figure 3
HAADF-STEM images of the Mg–In–Yb alloy isothermally aged at 200°C for 4 h. The electron beam is parallel to (a)–(c) [0001]_α and (d)–(f) [ $[11{\overline 2}0]$ ]_α. (a) Low-magnification HAADF-STEM image along the [0001]_α direction, showing that the bright-contrast platelets have three variants with a { $[10{\overline 1}0]$ }_α habit plane. (b) and (c) An enlarged image of two platelets connected at a 120° angle; the atomic scale HAADF-STEM images show that the structure in the observed two-dimensional image consists of many separate quasi-unit cells with ellipse-like shapes. (d) Low-magnification HAADF-STEM image along the [ $[11{\overline 2}0]$ ]_α direction. (e) and (f) An enlarged image of the platelets in Fig. 3