Figure 2
(a) Scheme of the transformation of the tetragonal antiprism to the trigonal prism with two added atoms. (b) Coordination polyhedra for atom Zn4 in La3(Zn0.874Mg0.126)11 and (c) for Al2 in La3Al11. The La—Al2 and La—Zn4 distances are denoted by dashed lines. The atom shifts are denoted by arrows. |