Characterization, Dissolution, and Solubility of Zn-Substituted Hydroxylapatites [(Zn_xCa_1−x)₅(PO₄)₃OH] at 25°C

Figure 3

Field emission scanning electron micrographs (FE-SEM) of the Zn-substituted hydroxylapatites [(Zn_xCa_1−x)₅(PO₄)₃OH] before dissolution (a) and after dissolution at 25°C with an initial pH of 2.00 for 360 d (b).