Figure 2
From: Coupling of emergent octahedral rotations to polarization in (K,Na)NbO3 ferroelectrics

(a) Distributions of the Na-O (solid lines) and K-O (dashed lines) bonds lengths for x = 0.47 (blue), x = 0.53 (red), and x = 0.58 (green). (b) A schematic rendering of the Na coordination with the Na and Nb displacements indicated using arrows. (c) Distributions of the Na-O1 bond lengths. (d) Distributions of the Na off-centering along the O1-Na-O1 direction.