Raman spectra of crystalline double sulphates

  title={Raman spectra of crystalline double sulphates},
  author={Vettai S. Ananthanarayanan},
  journal={Zeitschrift f{\"u}r Physik},
Raman spectra of single crystals of K2M(SO4)2 · 6 H2O where M=Mg, Zn, Ni or Co have been recorded for the first time usingλ 2537 as the exciting radiation. The corresponding five single sulphates have also been studied. Interesting results concerning the substitution of magnesium, zinc, nickel or cobalt in the double sulphate lattice on the sulphate frequencies are observed. The lattice spectra of these double sulphates are analysed group theoretically and discussed in relation to the lattice… 
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Polarization studies on the Raman spectra of suitably oriented single crystals of the isomorphous M2′M″ (SO4)2·6H2O (M′ = K or NH4 and M″ = Mg, Zn, Ni, and Co) have been carried out to assign the
IR and polarized Raman spectra of K2Mg(SO4)2•6H2O
IR and polarized Raman spectra of K2Mg(SO4)2 · 6H2O have been recorded and analyzed. From the spectra, the vibrations due to SO2−4 ion, the complex [Mg(H2O)6]2+ and the water molecules have been
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The Raman spectra of the single crystal of K2Zn(SO4)2·6H2O belonging toC2h5 space group in the 40–1200 cm−1 region in different scattering geometries and their spectra ofthe microcrystalline salt in
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The infrared spectra of (NH4)2M″(SO4)2.6H2O has been analysed in the region 4000–250 cm−1. The dynamics of each crystal has been discussed in terms of 234 phonon modes, including 3 acoustical ones,
Investigation of crystal hydrates of inorganic salts, VIII. Interpretation of the vibrational spectra of M(BF 4)26H 2O (M=Fe 2+, Co2+, Ni2+)
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Raman spectrum of a Cs2SO2 single crystal has been recorded and measured using an Ar+ laser as a source of excitation. The polarization behaviour of the Raman lines under different crystal
Über die Struktur vonM(BF4)2·6H2O fürM=Mg2+, Zn2+, Cd2+
The IR and Raman spectra ofM(BF4)2·6H2O forM=Mg2+, Zn2+ and Cd2+ in the range 4000–140 cm−1 were recorded, as were theirDTA andTG curves up to 500°C. The data obtained confirm the presence of the
Libratory modes of water molecules in tutton salts
The existence of rocking, wagging and twisting librations of different types of water molecules in tutton salts has been established from their ir spectra. These bands have been identified, following
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RésuméLes spectres d'absorption infrarouge de sulfates doubles hexahydratés de la série magnésienne permettent de confirmer l'existence de fortes liaisons hydrogéne entre les molécules d'eau et le