HIGH RESOLUTION INFRARED SPECTRA OF THE CRYSTALLINE GROUP IV HYDRIDES AT $4^{\circ} -77^{\circ} K$

Abstract

Infrared spectra of solid methane, silane and germane; of their solid solutions with one another and with the rare gases are reported. Spectra were recorded at $4^{\circ}$, $45^{\circ},65^{\circ}$ and $77^{\circ} K$ using a Perkin-Elmer 112G spectrometer, equipped with a PbTe photo-detector. Line-like spectra have been obtained and. their possible interpretations are discussed. The effects of crystal symmetry and of the hypothesis of free or restricted rotation are examined.