Raman spectroscopic monitoring of oxygen clathrate hydrate formation from microporous amorphous solid water

Abstract

The O₂ stretching vibration of O₂ adsorbed by vapour-deposited amorphous solid water, after crystallization of amorphous to cubic ice, and after formation of oxygen clathrate hydrate, has been studied by Raman spectroscopy: its peak maximum is shifted increasingly to lower frequency and evidence is given that only the large cages of the clathrate hydrate structure are occupied by O₂ molecules.