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Thermal investigations of nitrate-hydrates and deuterates of Ca2+, Cd2+ and Mg2+

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Abstract

DTA and DSC were used to study the thermal behaviour of Ca(NO3)2·4H2O, Cd(NO3)2·4H2O, Mg(NO3)2·6H2O and their deuterated analogues. Evidence was found concerning the process of melting of the initial hydrates and deuterates, followed by a one-stage dehydration of the melt to vield the respective anhydrous salt.

T m, ΔH om , ΔS om and ΔH odeh were determined and the ΔH of values for the investigated hydrates were calculated from the ΔH odeh data.

Zusammenfassung

DTA und DSC wurden zur Untersuchung des thermischen Verhaltens von Ca(NO3)2·4H2O, Cd(NO3)2·4H2O, Mg(NO3)2·6H2O und ihrer deuterierten Analoge eingesetzt. Man fand Aussagen bezüglich des Schmelzvorganges der Ausgangshydrate und Deuterate, gefolgt von einer Einschritt-Dehydratation der Schmelze unter Bildung der entsprechenden wasserfreien Salze.

T m, ΔH om , ΔS om und ΔH odeh wurden ermittelt und die ΔH of Werte für die untersuchten Hydrate wurden anhand der ΔH odeh berechnet.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Sofia Technological University, 1156, Sofia, Bulgaria

    D. Nikolova & M. Maneva

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  1. D. Nikolova
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  2. M. Maneva
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Nikolova, D., Maneva, M. Thermal investigations of nitrate-hydrates and deuterates of Ca2+, Cd2+ and Mg2+ . Journal of Thermal Analysis 44, 869–875 (1995). https://doi.org/10.1007/BF02547271

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  • DOI: https://doi.org/10.1007/BF02547271

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