Figure 5. Raman spectra obtained from different crystals grown in vitro with the addition of different concentrations of ASM: (A) 0 µg.ml⁻¹, (B) 0.1 µg.ml⁻¹, (C) 1 µg.ml⁻¹, (E) 5 µg.ml⁻¹, (E) 20 µg.ml⁻¹ and (F) 20 µg.ml⁻¹.

The visible bands clearly distinguish calcite and vaterite.