The Infrared Absorption Spectrum of Solid Hydrogen Chloride

The infrared absorption spectrum of solid hydrogen chloride has been studied in the region of $3.7 \mu$ with the aid of an echellette grating. The band is composed of a series of fairly broad lines, and if the center is taken to be the line at 2669 ${\mathrm{cm}}^{-1\mathrm{}}$ the remaining lines taken in pairs can be grouped about this line with approximately equal spacings. Thus it appears that the band differs from the band in gaseous hydrogen chloride in that it has a zero line.