Vibrational spectra and crystal lattice dynamics of hexahydrates of zinc potassium and ammonium sulfates

The IR spectra and polarized Raman spectra of crystals of hexahydrates of zinc potassium and ammonium sulfates have been obtained experimentally at 93 K and at room temperature. The frequencies and modes of normal vibrations of the octahedral complex Zn(H₂O)₆]²⁺ have been calculated. The assignment of the observed lines of the internal and external vibrations of the crystal cell has been made by calculations and by factor-group analysis. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 67, No. 2, pp. 162–168, March–April, 2000.