Table 1 Fluoride ion content, unit cell parameters, and ζ-potential of F-HAp and HAp
Sample | Fluoride ion content (%) ** | Unit cell parameters | ζ-potential (mV) | ||
|---|---|---|---|---|---|
Feed | Measured | a-axis (Å) | c-axis (Å) | ||
NHAp* | 0 | 0 | 9.439 | 6.895 | 1.43 |
F(30)-HAp | 30 | 24 | 9.431 | 6.886 | −0.32 |
F(50)-HAp | 50 | 52 | 9.407 | 6.905 | −1.63 |
F(100)-HAp | 100 | 84 | 9.382 | 6.892 | −21.1 |