Figure 1
Schematic rendering of (a) the KNbO3 structure and (b) correlated Nb (red arrows) and O (orange arrows) displacements within the <100> -Nb-O-Nb-O- chains. The cubic KNbO3 structure contains such chains with Nb atoms displaced along all inequivalent <111> directions. Oxygen atoms in each chain are displaced toward Nb.  [article HTML]

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