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The thermal analysis of “argentic oxynitrate” and silver oxides

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Abstract

The precise stoichiometry of “argentic oxynitrate” has been elucidated by analytical and thermal analytical techniques. A decomposition path of the oxynitrate has been proposed and values of the enthalpy changes obtained. TG has been used as the criterion of purity of silver(II) oxide and new values for the heat of formation of silver(I) and silver(II) oxide are reported.

Résumé

Etude de la stoechiométrie précise de “l'oxynitrate argentique” par les techniques analytiques et thermoanalytiques. On propose un schéma de décomposition de l'oxynitrate et l'on évalue les variations d'enthalpie. Emploi de la TG comme critère de pureté de l'oxyde d'argent(II). Communication de nouvelles valeurs pour les chaleurs de formation des oxydes d'argent (I) et d'argent (II).

Zusammenfassung

Die genaue Stöchiometrie des “Silberoxynitrats” wurde durch analytische und thermoanalytische Prüfung geklärt. Der Zersetzungsvorgang des Oxynitrats wurde verfolgt und die Enthalpieänderungen beobachtet. Die Reinheit von Silber(II)oxyd läßt sich thermogravimetrisch kontrollieren. Es wurden neue Werte für die Bildungswärmen des Silber(II)oxyds und Silber(I)oxyds gefunden.

Резюме

Аналитическим и терм оаналитическим мето дами исследована стехиом етрия оксинитрата серебра. Приведен предполага емый ход распада оксинитрата и получена величина изменения э нтальпии. В качестве к ритерия чистоты окиси серебр а (II) использована кривая ТГ. Установлен ы новые величины тепл от образования окисей с еребра (I) и (II).

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Authors and Affiliations

  1. Department of Chemistry, Paisley College of Technology, Paisley, Scotland

    J. C. Jack & T. Kennedy

Authors
  1. J. C. Jack
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  2. T. Kennedy
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Additional information

The authors wish to thank Mr. J. McEwan and Mrs. I. M. Walker for valuable practical assistance and the United Kingdom Atomic Energy Authority for financial support.

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Jack, J.C., Kennedy, T. The thermal analysis of “argentic oxynitrate” and silver oxides. Journal of Thermal Analysis 3, 25–33 (1971). https://doi.org/10.1007/BF01911767

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  • DOI: https://doi.org/10.1007/BF01911767

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