6.3 Two-Phase Layered–Spinel Region
79
Fig. 6.2 Contour plots of the
a and c lattice parameters
obtained by fitting all regular
cooled layered structures
made in oxygen as hexagonal
structures. The green dotted
line in a is the constant
oxidation number line for
layered structures with Ni
2+
and Mn
4+ . Filled points
represent single-phase
samples while open symbols
represent multiple-phase
samples
Fig. 6.3 XRD scans of
quenched samples in the
coexistence region showing
both layered and spinel
structures near the Li–Mn
line. The compositions of
samples H 6 and G 6 are
indicated in Fig. 6.5
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