Sr. No.

Observed wave numbers in cm−1

Bonds/Vibrational assignments

1

3514.42

H-O-H stretching vibrations of water

2

3275.24

H-O-H stretching vibrations of water

3

2478.61

H-O-H stretching vibrations of cluster of water molecules of crystallization

4

2393.74

H-O-H stretching vibrations of cluster of water molecules of crystallization

5

1699.34

H-O-H bending modes of vibrations

6

1653.05

H-O-H bending modes of vibrations

7

1232.55

n3 asymmetric stretching vibrations of PO4

8

1165.04

n3 asymmetric stretching vibrations of PO4

9

1062.81

n3 asymmetric stretching vibrations of PO4

10

1022.31

n1 symmetric stretching vibrations of PO4

11

891.14

Wagging modes of vibrations of coordinated water

12

684.75

Oxygen-metal bond