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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 551 (1987), S. 67-73 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Koexistenzgebiete im System Mn—Mo—O und thermochemische Daten von Mn2Mo3O8 und MnMoO4Mittels TG-Messungen wurde die Zersetzung von MnMoO4 und Mn2Mo3O8 in einer definierten Sauerstoffatmosphäre untersucht. Der aus den Ergebnissen erhaltene isotherme Schnitt des μ-x-Phasendiagramms des Systems Mn—Mo—O zeigt keine weitern ternären Phasen.Folgende thermochemische Daten wurden erhalten: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{l} \Delta _{\rm f} {\rm H}^ \circ {\rm (MnMoO}_{\rm 4} {\rm, 298) = } - 12{\rm 57 kJ/mol, S}^ \circ {\rm (MnMoO}_{\rm 4} {\rm, 298) = 134 J/(mol } \cdot {\rm K) } \\ \Delta _{\rm f} {\rm H}^ \circ {\rm (Mn}_{\rm 2} {\rm Mo}_{\rm 3} {\rm O}_{\rm 8} {\rm, 298) = } - 2{\rm 595 kJ/mol, S}^ \circ {\rm (Mn}_{\rm 2} {\rm Mo}_{\rm 3} {\rm O}_{\rm 8} {\rm, 298) = 279 J/(mol } \cdot {\rm K) }{\rm .} \\ \end{array} $$\end{document}
    Notes: The decomposition of MnMoO4 and Mn2Mo3O8 has been investigated by modified TG measurements in a controlled oxygen atmosphere. From the results the μ-x phase diagram of the system Mn—Mo—O in an isothermal representation has been obtained. The following thermochemical data have been evaluated: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{l} \Delta _{\rm f} {\rm H}^ \circ {\rm (MnMoO}_{\rm 4} {\rm, 298) = } - 12{\rm 57 kJ/mol, S}^ \circ {\rm (MnMoO}_{\rm 4} {\rm, 298) = 134 J/(mol } \cdot {\rm K) } \\ \Delta _{\rm f} {\rm H}^ \circ {\rm (Mn}_{\rm 2} {\rm Mo}_{\rm 3} {\rm O}_{\rm 8} {\rm, 298) = } - 2{\rm 595 kJ/mol, S}^ \circ {\rm (Mn}_{\rm 2} {\rm Mo}_{\rm 3} {\rm O}_{\rm 8} {\rm, 298) = 279 J/(mol } \cdot {\rm K) }{\rm .} \\ \end{array} $$\end{document}.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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