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

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.

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