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(Color online) Measured (a) Mg K-edge, (b) Zn K-edge XANES spectra of MZO nanocrystals and simulated (c) Mg K-edge, (d) Zn K-edge XANES spectra of MZO. The number labeled on each spectrum is the Mg mole fraction (x). For the measured spectra of the mixed phase samples, the linear combination fits are shown using dashed lines.
(Color online) Phase fractions of samples with different Mg contents (x) as determined by XANES (solid curve) and XRD (dashed curve). The area under (above) the thick black curve represents the fraction of RS (WZ) determined by XANES. For example, at x = 0.50, the RS fraction is 0.72 and WZ is 0.28. The shadings indicate the cation compositions (magenta (darker) = Mg and green (lighter) = Zn) in each phase.
Rocksalt phase fractions of MgxZn1 − xO nanocrystal alloys obtained by XANES (FXANES) and XRD (FXRD). f Mg and f Zn are the partial phase fractions of Mg and Zn in 6-fold coordination, indicating the fraction of Mg and Zn in RS phase, measured by using Mg and Zn K-edge XANES, respectively.
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