Table 2.
Observed and assigned Raman bands from different HAP samples and natural bone.
| Synthetic HAP | Carbonated HAP | Mesoporous HAP NPs 80 °C | HAP 1400 °C | ||
|---|---|---|---|---|---|
| (cm−1) | (cm−1) | (cm−1) | (cm−1) | ||
| PO43− | v2 | 432 | 431 | 432 | N/A |
| 447 | 449 | 445 | |||
| PO43− | v4 | 585 | 581 | 577 | N/A |
| 597 | 592 | 590 | |||
| 614 | 608 | 608 | |||
| 622 | - | - | |||
| A CO32− | v4 | - | 664 | - | N/A |
| B CO32− | v4 | - | 730 | - | |
| TCP | 939 | ||||
| 946 | |||||
| 968 | |||||
| 1008 | |||||
| PO43− | v1 | 962 | 963 | 959 | 955 |
| - | - | - | - | ||
| - | - | - | - | ||
| PO43− | v3 | 1030 | - | - | 1026 |
| 1046 | 1048 | 1046 | 1047 | ||
| 1077 | 1078 | 1072 | 1075 | ||
| - | - | - | 1091 | ||
| B CO32− | v1 | - | 1069 | 1050 | - |
| A CO32− | v1 | - | 1114 | 1100 | - |
| Reference | [47] | [50] | [51] | [30] | |
HAP: hydroxyapatite, TCP: tricalcium phosphate.