• G Aruldhas

      Articles written in Journal of Chemical Sciences

    • Infrared and Raman spectra of three tetrametaphosphatesM2P4O12(M = Fe, Ni, Zn)

      K Viswanathan V U Nayar G Aruldhas

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      The infrared and Raman spectra of three tetrametaphosphatesM2P4O12 (M = Fe, Ni, Zn) have been recorded and analysed. A factor group model has been used to interpret the spectra of Fe2P4O12 and Ni2P4O12. A free ion model could explain the Zn2P4O12 spectra. The frequencies have been assigned on the basis of characteristic vibrations of PO22− and P-O-P groups. The P4O124− ion is found to haveCi symmetry in Fe2P4O12 and Ni2P4O12 andC24 in Zn2P4O12. The ion in Fe2P4O12 is more distorted than in the other two.

    • IR and polarized Raman spectra of strontium tartrate trihydrate

      P Rajagopal G Sekar G Aruldhas V Ramakrishnan

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      The IR and polarized Raman spectra of SrC4H4O6 · 3H2O have been recorded and analysed. The factor group analysis of the divalent tartrate ion has been carried out on the basis of C2 symmetry. As the ion possesses lower symmetry in the crystal, splittings have been observed for the different vibrational modes. Separate bands in the bending region of water suggest the existence of three crystallographically different water molecules in the crystal, which is confirmed by deuterium substitution.

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