Effect of the hexadecapole moment on the translational vibrational absorption by carbon-dioxide-type crystals

Abstract

The effect of a hexadecapole moment on the absorption by the translational vibrations of carbon-dioxide-type crystals has been calculated. If the qudrupole and hexadecapole moments have the same sign the absorption is relatively insensitive to the hexadecapole moment and the hexadecapole moment may reduce the integrated absorptivity to a minimum of about 0.85 of the value for the quadrupole moment alone. If the moments have opposite signs, the absorptivity can be increased significantly by a hexadecapole moment of the expected magnitude.