Raman spectra of lithium hydroxide single crystals

First order Raman frequencies, linewidths, intensities and assignments to the symmetry species of all modes predicted by group theory at 20°C and at 78 K are reported for the first time. Assignments of the fundamental frequencies to stretching vibrations or librations of the OH^? ions, internal vibrations of Li⁺ ions of the same layer or translational modes of the Li⁺ and OH^? layers are derived from factor group analysis and correlation methods. They correspond to the constructions of unit cell modes by Wickersheim[2].