From: The usability of ark clam shell (Anadara granosa) as calcium precursor to produce hydroxyapatite nanoparticle via wet chemical precipitate method in various sintering temperature
Assignments
Vibrational frequencies (cm−1)
FTIR result
Salma et al. (2010)
Singh and Purohit (2011)
Kamalanathan et al. (2014)
PO4 3− bending v 4
565
560, 599
567
568
PO4 3− stretching v 3
1024
1046
1038
CO3 2− group v 3
1454
1424, 1424
1422
1421
OH− structure
3744
1637, 3100–3700
3431
3425