Fig 4. FTIR spectra of the solid solution series of AsO4–ettringite and SO4–ettringite.
a, b, c, d, e, f, g, and h correspond to the samples with Xsolid of 0, 0.04, 0.09, 0.12, 0.30, 0.53, 0.65, and 1.00, respectively.
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