Far-Infrared Spectra of Ice II, V, and IX

Abstract

The far‐infrared spectra of ice II, V, and IX as recovered at liquid‐nitrogen temperature and atmospheric pressure have been obtained in the range 360–20 cm⁻¹ to complement an earlier investigation in the range 4000–350 cm⁻¹. The bands of ice II and IX are sharp, as is characteristic of ordered crystals, whereas those of ice V are broad, as is characteristic of orientationally disordered crystals. These observations agree with previous conclusions about these phases.