Formation of amorphous calcium carbonate and its transformation into mesostructured calcite†

58 | CrystEngComm, 2015, 17, 58–72 This journal is © The R a University of Granada, Department of Mineralogy and Petrology, Granada, Spain. E-mail: [email protected] b Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, 30-059 Kraków, Poland c KU Leuven, Department of Civil Engineering, Leuven, Belgium † Electronic supplementary information (ESI) available: Solubility and dissolution enthalpy of calcium carbonate phases (Table S1); additional optical microscopy, Raman, ESEM, FESEM, XRD, FTIR results (Fig. S1–S4); calculation of the solubility product (ksp) of anhydrous ACC (Fig. S5); TEM-SAED images of hydrated ACC decomposition following focused e-beam irradiation (Fig. S6–S7); EDPs of ACC and simulated EDPs of crystalline phases with randomly oriented domains (Fig. S8); focused e-beam transformation of an ACC particle formed during Stage II (Fig. S9–S10); TEM-SAED analysis of ACC structures formed during Stage II and exposed to humid air (85% RH, 20 °C) for 48 h (Fig. S11); transformation of hydrated ACC formed during Stage I into calcite upon exposure to humid air (85% RH; 20 °C) for 48 h (Fig. S12); self-diffusion coefficient, D, of Ca ions in water and in solid CaCO3 (Fig. S13). See DOI: 10.1039/c4ce01562b Cite this: CrystEngComm, 2015, 17, 58