DISTORTION-INDUCED INTENSITY OF RAMAN MODES OF MOLECULAR UNITS IN DIFFERENT CRYSTAL ORIENTATIONS

Using the principles of the theory of distortion‐induced activity of forbidden Raman modes of molecular units in differnt crystal orientations and the theory of distortion‐induced Raman intensities of different modes of molecular units adsorbed onto metal surfaces, the distortion‐induced intensities of different Raman modes of molecular units in differnt crystal orientations is discussed. An example of the intensities of ν1s, ν2s, ν3s and ν4s (where s represents the SO 42− ion) of (NH4)2SO4 [D 2h16] single crystal in Ag, B1g, B2g B3g orientations is discussed to demonstrate the usefulness of the results of these theories. Copyright © 1990 John Wiley & Sons, Ltd.