Vibrational Spectra of Molecules and Complex Ions in Crystals VII. The Raman Spectrum of Crystalline Ammonia and 3-Deutero-Ammonia

Abstract

The Raman spectra of crystalline NH₃ and ND₃ were measured at —82°C, using Hg 2536.5A exciting radiation. The fundamentals v₁, v₂, and v₃ were observed, but v₄ was not. v₂ was split into two components by intermolecular coupling. Lattice frequencies of both translational and rotational origin were observed, and there was evidence of very little coupling between them.