Raman scattering of light from representative alkali halide crystals containing CN(-), NO2(-), OH(-), and OD(-) impurities is reported and analyzed. The observed spectra have a low frequency range, in which the scattered light is usually shifted from the incident light by less than 300 to 400/cm, and a high frequency range in which the shifts are typically 1000 to 2000/cm. Although the low frequency region does not readily lend itself to quantitative analysis it is clear that its main features can be interpreted in terms of a mixture of second order scattering from the pure host, impurity induced first order scattering that results from perturbing the pure host, and scattering from the rotational degrees of freedom of the molecular impurity. The high frequency region, on the other hand, consists of spectra whose frequencies are characteristic of the internal normal coordinates of the molecule. A very narrow totally polarized line with depolarized sideband structure is generally observed.

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