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Figure 4 . Oxygen cages of K1A (a) and K1B (b). Short and long K–O contact are showed as solid lines and dashed lines, respecively. [Symmetry codes: (iv) y-1,−x+1, z-1/4; (v) y,−x+2, z-1/4;(vi)−x+1,−y+2, z-1/2; (vii)−x+1,−y+1, z-1/2; (viii)−y+1, x, z-3/4; (ix) y,−x+1, z-1/4 |