Research Article
Dissolution and Solubility Product of Cd-Fluorapatite [Cd5(PO4)3F] at pH of 2–9 and 25–45°C
Table 2
Thermodynamic data of Cd-FAP than Ca-FAP in the aqueous acidic media (an initial pH of 2).
| FAP | Temperature (°C) | Average | (J/K·mol) | (J/mol) | (J/K·mol) | (J/K·mol) |
| Ca-FAP | 25 | −60.02 | 342473.29 | −187235.69 | −1777.55 | 4349.85 | 35 | −60.84 | 358789.08 | −98779.03 | −1485.61 | 4495.82 | 45 | −61.13 | 372185.51 | −7403.00 | −1193.67 | 4641.79 |
| Cd-FAP | 25 | −60.03 | 342515.78 | −85088.80 | −1434.91 | 2339.50 | 35 | −60.38 | 356079.86 | −37513.71 | −1277.90 | 2418.01 | 45 | −60.45 | 368073.80 | 11631.51 | −1120.89 | 2496.51 |
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