A hydrated crystalline calcium carbonate phase: Calcium ...
shaped CCHH crystals to MHC resembles that of needle-shaped hemihydrate bassanite crystals (CaSO 4·½H 2O) to gypsum (CaSO 4·2H 2O) (21). We performed experiments at different ini- tial carbonate concentrations and Mg2+ con-tents to uncover optimal conditions for CCHH synthesis (figs. S4 to S6). We found that CCHH can only be synthesized in solutions containing .
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