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. 2019 Sep 16;117(23):12584–12591. doi: 10.1073/pnas.1821673116

Fig. 6.

Fig. 6.

Synthesis of alite, 3CaO-SiO2, using Ca(OH)2 produced in decarbonation reactor. (A) XRD pattern and (B) SEM image of mixture of Ca(OH)2 and SiO2 after heating to 600 °C for 2 h in air. The Ca(OH)2 has decomposed to CaO but has not yet reacted with the SiO2 to form the alite phase. After firing at 1,500 °C for 2 h, (C) XRD pattern shows single-phase alite, the morphology of which is shown in the SEM image in D. Composition maps (E and F) of calcium and silicon, respectively, show uniform distribution of both elements.