Lattice Vibration Spectra of Mg(OH)_2 and Ca(OH)_2

Publisher Website
Google Scholar
Abstract
The infrared absorption spectra from 700 to 75 cm−1 of Mg(OH)2, Mg(OD)2, Ca(OH)2, and Ca(OD)2 are presented. These spectra were obtained from powders dispersed in polyethylene. In addition, the results of a Raman scattering experiment performed on a single crystal of Mg(OH)2 are presented. These results indicate four lines corresponding to the four predicted symmetric modes. The results of these experiments are compared with previous data obtained from other Raman and inelastic neutron scattering experiments to determine fundamental lattice vibrations of these crystals. Many of these lattice vibrations are observed to combine with the OH− stretching vibrations to produce the complex absorption spectra near 2.7 μ.