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Table 1 Characteristic IR absorptions of hydroxyapatite

From: Spectroscopic determination of alkyl resorcinol concentration in hydroxyapatite composite

Wavenumber (cm−1)

Bond

Position

Reference

3572

OH

1

(Kim et al. 2011a; Raynaud et al. 2002; Han et al. 2006; Kim et al. 2012)

3000~3600

H2O

2

(Meejoo et al. 2006)

1028, 1088

PO4 3− (ν3)

3, 4

(Chang & Raynaud et al. 2002; Destainville et al. 2003; Kim et al. 2011b; Han et al. 2006; Kim et al. 2012)

962

PO4 3− (ν1)

5

(Chang and Tanaka 2002; Kim et al. 2011a; Han et al. 2006)

870

HPO4 3−

6

(Destainville et al. 2003; Han et al. 2006)

632

Labile PO4 3−

7

(Chang and Tanaka 2002; Kim et al. 2011b)