The Vibrational Spectra of Molecules and Complex Ions in Crystals. VI. Carbon Dioxide

摘要

A previously reported discrepancy between the predicted and observed infrared spectrum of crystalline carbon dioxide is shown to arise from the presence of two peaks due to C13O2, a combination band involving a lattice frequency near 110 cmminus;1and two reflection peaks. The infrared spectrum was studied at minus; 190deg;C and aside from the previous features shows one component from ngr;3and two from ngr;2, shifted very little from the gas frequencies. The difficulties encountered in interpreting the spectrum of this simple crystal occur quite generally in the spectra of more complicated substances.