Table 1.
Active Raman scattering modes in the spectra of the biomimetic and natural mineralized tissue (enamel), reference samples, and involved materials.
| Bond | Wavenumber, cm−1 | Assignment | References |
|---|---|---|---|
| Ca–PO43− | 139–140 | Lattice | [44] |
| CaII–OH | 186–191 | Lattice | [44] |
| Ca–PO43− | 201–205 | Lattice | [44,51,52] |
| Ca–PO43− | 231–234 | Lattice | [44,51,52] |
| Ca–PO43− | 263–265 | Lattice | [44,51,52] |
| CaII–OH | 272–274 | Translation | [44,51,52] |
| Ca–PO43− | 283–285 | Libration | [44,51,52] |
| CaII–OH | 309–315 | Translation | [44,51,52,53] |
| CaII–OH | 329–330 | Translation | [51,53] |
| υ2 PO43− | 430–432 | O-P-O bending, υ2 | [45,47,48,50,51,54] |
| υ2 PO43− | 445–446 | O-P-O bending, υ2 | [45,47,48,50,51,54] |
| υ4 PO43− | 578–580 | O-P-O bending, υ4 | [45,47,48,50,51,54] |
| υ4 PO43− | 589–591 | O-P-O bending, υ4 | [45,47,48,50,51,54] |
| υ4 PO43− | 608–610 | O-P-O bending, υ4 | [45,47,48,50,51,54] |
| υ4 PO43− | 615–617 | O-P-O bending, υ4 | [45,47,48,50,51,54] |
| υ1 PO43− | 959–962 | P-O stretching, enamel, synthetic hydroxyapatite | [45,47,48,50,51,54,55] |
| HPO42− | 1002–1004 | phosphate Sym stretching | [47,56] |
| υ3 PO43− | 1024–1026 (1030 Hap) | P-O asymmetric stretching, enamel, synthetic hydroxyapatite | [47,49,51,57,58,59] |
| υ3 PO43− | 1041–1042 | P-O asymmetric stretching | [47,49,51,57,58,59] |
| υ3 PO43− | 1044–1046 (1047 Hap) | P-O asymmetric stretching, enamel, synthetic hydroxyapatite | [47,49,51,57,58,59] |
| υ3 PO43− | 1055–1057 | P-O asymmetric stretching | [47,49,51,57,58,59] |
| υ1 CO3 B-type | 1068–1070 | PO43− by CO3 substitution | [47,49,51,57,58,59] |
| υ3 PO43− | 1075–1078 HAp | P-O asymmetric stretching, enamel, synthetic hydroxyapatite | [47,49,51,57,58,59] |
| υ1 CO3 A-type | 1101–1104 | OH by CO3 substitution | [47,49,50] |