Manifestations of latent space group symmetry in the vibrational spectra of three alkali metal perchlorates

Abstract

The vibrational spectra of crystalline MClO4 where M=K, Rb, and Cs are reinterpreted in terms of a vibrational unit cell (Imma) which is one-half the size of the crystallographic (Pnma). Single crystal Raman data on these species are reported.