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Variation of the a- and c-axis with x, Al(III) content, for as-synthesized (■) and post hydrated (▲) Mg1−xAlx(OH)2(NO3)x·mH2O layered double hydroxides (LDHs) synthesized at pH 10.0. (◇) represent synthesis at pH 11.0. Gray shading indicate range where additional diffraction peaks prove lack of phase purity, see text.
