Infrared Absorption Spectra of Water of Crystallization in Sodium Sulfate Decahydrate Crystals

Abstract

The observed spectra of water of crystallization were interpreted on the basis of the effect of hydrogen bonding. It was proposed that at least two kinds of water molecules exist in the unit cell of the crystal. The corresponding two O–H…O distances were roughly estimated to be 3.01 and 2.58 Å respectively by the use of Glemser’s relationship between the stretching frequency and the hydrogen bond distance.