If an observed infrared reflectance band corresponds to a harmonic vibrational mode, then it is feasible by means of well known dispersion relationships to calculate reflectance values Rcfor an ideal reflectance curve that agrees with the curve obtained from experimentally observed Rxvalues. The technique of comparing Rcwith Rxhas been denoted as “classical dispersion,” or CD analysis. In the obtaining of dispersion parameters, such as oscillator strength (Sj), damping constant (Yj), and resonant frequency (vj) through CD analysis of infrared reflectance data, a number of methods have been used.