Abstract
The paper deals with a study of the proton nuclear magnetic resonance (NMR) of crystallization water in isomorphous monohydrates MgSO4. 1 H2O and FeSO4. 1 H2O in the temperature range 123–313 K. The NMR second moment for diamagnetic MgSO4. 1 H2O shows only a weak dependence on temperature but the one for paramagnetic FeSO4. 1 H2O is rather strong. Results obtained for FeSO4. 1 H2O are in a good agreement with the Kroon's theory of NMR in paramagnetics. The Curie-Weiss constant and the effective magnetic moment of Fe2+ ions in FeSO4. 1 H2O are derived from the temperature dependence of NMR second moment.
The motion of molecules of crystallization water in these hydrates is discussed on the basis of temperature dependences of the width and second moment of NMR spectra.
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The author expresses his grateful acknowledgements to Prof. Dipl. Ing. M. Rákoš, DrSc. for reading the manuscript and for valuable discussions, to Dr. K. Jelšovská for preparing the samples, to Mrs. E. Havlíková and Mr. J. Varga for their help in NMR experiments and data treatment.
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Murín, J. Study of temperature variations of NMR spectra in monohydrates FeSO4. 1 H2O and MgSO4. 1 H2O. Czech J Phys 36, 740–750 (1986). https://doi.org/10.1007/BF01597413
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DOI: https://doi.org/10.1007/BF01597413