Figure 4
Time-resolved data showing the hydration of (a, c, e) α-CaSO4·0.5H2O and (b, d, f) β-CaSO4·0.5H2O. (a, b) Diffraction patterns obtained at selected times after the start of reaction. (c, d) Contour plots of the XRD data as a function of time. (e, f) Phase fractions of the hemi- and dihydrate determined by batch Rietveld refinements and plotted in percentage terms. The numbers in panels (c) and (d) denote the 2θ positions of the major reflections. |