Raman shift (cm-1) Assignment Comments Refs.
430 ν2 PO43- Strong band (P-O stretching) [160]
582 ν4 PO43- P-O bending [172]
756 ν4 CO32- B-type carbonate is very weak [172]
856 ν(C-C) Collagen proline may include δ(C-C-H) [120]
876 ν(C-C) Collagen hydroxyproline [177]
880 ν2 CO32- C-O stretching [172]
950 ν1 PO43- Amorphous calcium phosphate (ACP), bone mineral (P-O) phase [178]
955 ν1 PO43- Octocalcium phosphate (OCP), HPO42- [155]
960 ν1 PO43- Р-О symmetric stretch [155]
1030 ν3 PO43- (Overlaps with proline ν (C-C) component) [112]
1070 ν1 CO32- B-type substitution (С-О in-plane stretch) [172]
1103 ν1 CO32- А-type substitution (С-О in-plane stretch) [179]
1181 ν(C-O-C) Phenylalanine, tyrosine [90]
1209 ω(CH2) Hydroxyproline, tyrosine [85]
1272 Amide III Protein α-helix, β-sheet and random coils (C-N-Н stretch) [180]
1375 δ(CH2) Proteoglycan, CH2 wagging [177]
1410 β(CH2) Lipids, CH deformation [91]
1455 δ(CH2) Protein, СН2 wag [91]
1565 Amide II C-N-Н stretch, bending N–Н [116]
1675 Amide I C=O stretch [181]
3550 ν(O-H) O-H stretching vibration [90]