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Figure 2
Stack of in situ XRD patterns obtained during the autoclave process. The reaction under the autoclave proceeds from bottom to top: the temperature was elevated from 373 K to 463 K and then held at 463 K for 6 h (see text). T: tobermorite; P: portlandite; Q: quartz; MS: monosulfate; HE: hydroxylellestadite; A: anhydrite. (a) In the vicinity of major tobermorite peaks. (b) A close-up three-dimensional pattern in the vicinity of the C–S–H amorphous halo; the hatched area indicates the region by which the amount of C–S–H would be reflected.

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