Journal of Thermal Analysis and Calorimetry

, Volume 78, Issue 1, pp 125–133 | Cite as

TG, DTA, FTIR and Raman spectral analysis of Zna/Mgb ammonium sulfate mixed crystals

  • G. Madhurambal
  • S. C. Mojumdar
  • S. Hariharan
  • P. Ramasamy


To understand the structural and thermal properties of the mixed crystals, thermogravimetric (TG) and differential thermal analysis (DTA), and FTIR and Raman spectral studies were carried out for the mixed crystals of Zna/Mgb ammonium sulfate of composition namely 'a' (fraction by mass of salt Zn[NH4]2[SO4]2·6H2O to the total salt (both Zn[NH4]2[SO4]2·6H2O, Mg[NH4]2[SO4]2·6H2O or it can be explained as ZnaMgb[NH4]2[SO4]2·6H2O, a + b =1), and a = 0.1, 0.25, 0.333, 0.5, 0.666, 0.75 and 0.9 grown by a solution technique. From the correlation and analysis of the results obtained for the various crystals, the desolvation, decomposition, crystalline transition phenomena were identified. By close comparison of the endotherms, obtained for the various crystals, it was found that isomorphous substitution takes place in the crystals. Up to 0.5, Zn2+ ion replaces isomorphous Mg2+ ions in the lattice sites of Mg[NH4]2[SO4]2·6H2O and above 0.5, Mg2+ ions occupies the Zn2+ ion in the lattice sites of Zn[NH4]2[SO4]2·6H2O. Both crystals belong to monoclinic system with P 2(1)/a symmetry. The vibrations of NH4 + ion, SO4 2- ion, the complex [Mg(OH2)6]2+ the complex [Zn(OH2)6]2+ and the three different water molecules are identified. The linear distortion of SO4 2- ion is found to be greater than its angular distortion, while the NH4 + ion has suffered more angular distortion. The possibility of free rotation of the NH4 + ion is ruled out.

TG DTA FTIR and Raman spectra Zna/Mgb ammonium sulfate mixed crystals 


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  1. 1.
    R.V. Khamiski, "Crystallization from solutions', Consultants Bureau, New York, (1969), p. 82Google Scholar
  2. 2.
    R. C. Mackenzie, "Differential Thermal Analysis', Academic Press (1970; v. I, v. 2, 1972).Google Scholar
  3. 3.
    A. Blazek 'Thermal Analysis', Van Norstrand Reintrol, 1973.Google Scholar
  4. 4.
    J. W. Mellor, A Comprehensive Treatise on Inorganic & Theoretical Chemistry Vol. IV, pp. 335-347, 633–641.Google Scholar
  5. 5.
    A. Eh. Tutton, Phil. Trans., 1 (1916) 216.Google Scholar
  6. 6.
    E. Jóna, M. Kubranová, P. Šimon and J. Mroziñski, J. Thermal Anal., 46 (1996) 1325.CrossRefGoogle Scholar
  7. 7.
    E. Jóna, A. Sirota, P. Šimon and M. Kubranová, Thermochim. Acta, 258 (1995) 161.CrossRefGoogle Scholar
  8. 8.
    F. Hanic, I. Horváth and G. Plesch, Thermochim. Acta, 145 (1989) 19.CrossRefGoogle Scholar
  9. 9.
    J. Skoršepa, K. Györyová and M. Melník, J. Thermal Anal., 44 (1995) 169.Google Scholar
  10. 10.
    E. Jóna, M. Hvastijová and J. Kohout, J. Thermal Anal., 41 (1994) 161.Google Scholar
  11. 11.
    G. D'Ascenzo, U. B. Ceipidor, E. Cardarelli and A. D. Magri, Thermochim. Acta, 13 (1975) 449.CrossRefGoogle Scholar
  12. 12.
    T. Šramko, G. Liptay and E. Jóna, J. Thermal Anal., 12 (1977) 217.CrossRefGoogle Scholar
  13. 13.
    Y. Masuda, Thermochim. Acta, 39 (1980) 235.CrossRefGoogle Scholar
  14. 14.
    L. Mao, S. J. Rettig, R. C. Thompson, J. Trotter and S. Xia, Can. J. Chem., 74 (1996) 433.CrossRefGoogle Scholar
  15. 15.
    R. W. Matthews and R. A. Walton, Inorg. Chem., 10 (1971) 1433.CrossRefGoogle Scholar
  16. 16.
    A. L. Magri, A. D. Magri, F. Balestrieri, E. Cardarelli, G. D`Ascenzo and A. Panzanelli, Thermochim. Acta, 48 (1981) 253.CrossRefGoogle Scholar
  17. 17.
    A. L. Magri and A. D. Magri, Thermochim. Acta, 38 (1980) 225.CrossRefGoogle Scholar
  18. 18.
    A. Ibnlfassi, M. Kaddami and K. El Kacemi, J. Therm. Anal. Cal., 74 (2003) 341.CrossRefGoogle Scholar
  19. 19.
    K. Moriya, T. Yamada, K. Sakai, S. Yano, S. Baluja, T. Matsuo, I. Pritz and Y. M. Vysochanskii, J. Therm. Anal. Cal., 70 (2002) 321.CrossRefGoogle Scholar
  20. 20.
    V. A. Drebushchak, Yu. A. Kovalevskaya, I. E. Paukov and E. V. Boldyreva, J. Therm. Anal. Cal., 74 (2003) 109.CrossRefGoogle Scholar
  21. 21.
    S. C. Mojumdar, M. Melník and E. Jóna, J. Anal. Appl. Pyrolysis, 46 (1998) 147.CrossRefGoogle Scholar
  22. 22.
    S. C. Mojumdar, M. Melník and E. Jóna, Polish J. Chem., 73 (1999) 293.Google Scholar
  23. 23.
    S. C. Mojumdar, M. Valko and M. Melník, Chem. Papers, 52 (1998) 650.Google Scholar
  24. 24.
    S. C. Mojumdar, M. Melník, E. Jóna and D. Hudecová, Chem. Papers, 53 (1999) 265.Google Scholar
  25. 25.
    S. C. Mojumdar, M. Melník and E. Jóna, Chem. Papers, 53 (1999) 309.Google Scholar
  26. 26.
    S. C. Mojumdar, D. Hudecová, M. Melník and E. Jóna, Chem. Papers, 54 (2000) 38.Google Scholar
  27. 27.
    S. C. Mojumdar, M. Melník and E. Jóna, Thermochim. Acta, 352 (2000) 129.CrossRefGoogle Scholar
  28. 28.
    S. C. Mojumdar and M. Melník, Chem. Papers, 54 (2000) 1.Google Scholar
  29. 29.
    S. C. Mojumdar, J. Therm. Anal. Cal., 64 (2001) 629.CrossRefGoogle Scholar
  30. 30.
    S. C. Mojumdar, M. Melník and E. Jóna, J. Therm. Anal. Cal., 56 (1999) 533.CrossRefGoogle Scholar
  31. 31.
    S. C. Mojumdar, I. Ondrejkovicová, L. Nevidanská and M. Melník, J. Anal. Appl. Pyrolysis, 64 (2002) 59.CrossRefGoogle Scholar
  32. 32.
    S. C. Mojumdar, K. Lebrušková and D. Valigura, Chem. Papers, 74 (2003) 905.Google Scholar
  33. 33.
    E. Jóna, M. Kubranová, S.C. Mojumdar and M. Kopcová, Chem. Papers, 56 (2002) 295.Google Scholar
  34. 34.
    S. Satoshi, C. Contreras, H. Juarez, A. Aguilera and J. Serrato, Int. J. Inorg. Mater., 3 (2001) 625.CrossRefGoogle Scholar
  35. 35.
    S. S. Sueyoshi and C. A. C. Soto, J. Eur. Ceram. Soc., 18 (1998) 1145.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publisher/Akadémiai Kiadó 2004

Authors and Affiliations

  • G. Madhurambal
    • 1
  • S. C. Mojumdar
    • 2
  • S. Hariharan
    • 3
  • P. Ramasamy
    • 4
  1. 1.A.D.M. College for Women Nagapattinam - 611001TamilnaduIndia
  2. 2.Institute for Research in ConstructionNational Research Council of Canada M-20Ottawa, ON, K1A 0R6Canada E-mail
  3. 3.Govt - College for Men, Thiruppur - 612001TamilnaduIndia
  4. 4.Crystal Growth CenterAnna University Chennai - 600025TamilnaduIndia

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