Wave number (cm−1)

Assignments

2902

C-H,CH2 stretching in cellulose

1471

H-C-H bending in cellulose

1337

H-O-C bending in cellulose

1091

β-1,4-glycosidic linkages

380.88

Amorphous cellulose

979

Hydroxy apatite

583

Hydroxy apatite

1074

Calcium carbonate

710

Calcium carbonate