Table 1.
Calculated crystallite size (D), internal strains (S) values, and degree of crystallinity (χc) of pure Hap, cerium (III)-doped hydroxyapatite and cerium (IV)-doped hydroxyapatite with various concentrations.
| Sample | D/nm | S/% | χc/% |
|---|---|---|---|
| Hap | 6.1 ± 0.8 | 1.5 ± 0.5 | 31.5 |
| Ca10−xCe(III)x(PO4)6(OH)2 | |||
| Ca9.95Ce(III)0.05(PO4)6(OH)2 | 6.3 ± 0.7 | 1.5 ± 0.6 | 38.2 |
| Ca9.9Ce(III)0.1(PO4)6(OH)2 | 5.4 ± 0.6 | 1.7 ± 0.6 | 33.7 |
| Ca9.75Ce(III)0.25(PO4)6(OH)2 | 5.6 ± 0.5 | 1.7 ± 0.6 | 33.6 |
| Ca9.5Ce(III)0.5(PO4)6(OH)2 | 4.8 ± 0.6 | 1.9 ± 0.7 | 34.5 |
| Ca9Ce(III)1(PO4)6(OH)2 | 3.7 ± 0.6 | 2.5 ± 0.9 | 21.1 |
| Ca10−xCe(IV)x(PO4)6(OH)2 | |||
| Ca9.95Ce(IV)0.05(PO4)6(OH)2 | 5.8 ± 0.8 | 1.6 ± 0.5 | 38.0 |
| Ca9.9Ce(IV)0.1(PO4)6(OH)2 | 5.7 ± 0.8 | 1.6 ± 0.6 | 38.8 |
| Ca9.75Ce(IV)0.25(PO4)6(OH)2 | 5.5 ± 0.8 | 1.7 ± 0.5 | 36.8 |
| Ca9.5Ce(IV)0.5(PO4)6(OH)2 | 4.6 ± 0.8 | 2.0 ± 0.6 | 37.2 |
| Ca9Ce(IV)1(PO4)6(OH)2 | 3.6 ± 0.5 | 2.6 ± 0.9 | 36.0 |