R2: Crystal structure, crystal chemistry, physical properties of minerals, crystal growth and applied mineralogy

[R2-11] Incorporation of L-aspartic acid into calcite lattice through amorphous calcium carbonate

*Shiho Marugata¹, Hiroyuki Kagi¹, Kazuki Komatsu¹ (1. Uni. Tokyo. Sci.)

Keywords:Calcite, Vaterite, Amino acid, Aspartic acid

We synthesized calcites through ACC containing Asp and investigated the structural changes. In XRD patterns, peaks broadened and shifted to higher angles with increasing Asp concentration. This result suggests that lattice distortions are caused by the incorporation of Asp. The cell volume of calcite decreased with increasing Asp concentration. Previous study has reported that the cell volume increased with increasing Asp concentration. These results suggest that the arrangements of Asp are different between the calcites obtained in this study and in the previous study.