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Na—1/3 ordering and the corresponding Mn charge ordering. Each subfigure shows the same type of information as in the corresponding subfigure of Figure 3. a,b) 3D and projective view of Na-1/3 ordering. c) Section of the (010) Mn3+ superplane with Na and Mn4+ superplane without Na. d) Elementary Na–O–Mn units of Mn3+ and Mn4+ superplanes for Na-1/3 ordering.
