MULTIPLE SITE AND ORIENTATIONAL EFFECTS IN IONIC AND MOLECULAR CRYSTALS..... 15min.

This Research was sponsored by the U.S. Atomic Energy Commission under contract with the Union Carbide Corporation.Author Institution: Oak Ridge National LaboratoryApparent splittings observed for the fundamental vibrations of molecules or molecular ions in a number of crystals have been shown to originate from multiple site or orientational effects. In some cases, the observed splitting has been incorrectly ascribed to other processes. Results from recent studies with crystalline $MoF_{5}$, $K_{2}Cr_{2}O_{7}$, $Na_{2}Co_{3}$, $KClO_{3}$, and $Na_{2}Fe(CN)_{5}$ $NO\cdot2H_{2} O$ will be used to illustrate these effects