Table 2: Total irreducible representation and spectral activity of the monoclinic and aragonite-type crystal for (a) ( ), (b) ( ), and (c) ( ) space group.
(a)

Crystal symmetry TranslationsAcousticalRotationIntramolecularSpectral
(lattice vibrations)vibrations(libration)vibrationsactivity

425R
1132IR
232R
2225IR

Total vibrations931014

(b)

Crystal symmetry TranslationsAcousticalRotationIntramolecularSpectral
(lattice vibrations)vibrations(libration)vibrationsactivity

5157R, IR
657R
5157R, IR
5157R, IR

Total vibrations2132028

(c)

Crystal symmetry TranslationsAcousticalRotationIntramolecularSpectral
(lattice vibrations)vibrations(libration)vibrationsactivity

415R
3115IR
3115IR
415R
242
242R
242R
1142IR

Total vibrations2132028