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Paradoxes and paradigms: observations on pyrohydrolysis, oxygen bomb combustion, and alkaline carbonate fusion, most frequently used decomposition methods for subsequent determination of fluorine and accompanying thermochemistry

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Abstract

Pyrohydrolysis, oxygen bomb combustion, and alkaline carbonate fusion are the most frequently used methods for decomposition of fluorine containing materials. The efficiency of these methods was proven by the determination of fluorine content in certified reference materials of clay and vegetation. Possible reactions proceeding during decomposition were suggested and accompanying thermochemistry discussed. The Gibbs energies were estimated to establish if suggested reactions are thermodynamically favorable or not. In addition, linear relationships between the enthalpies of formation of metal fluorides and the balanced values of the enthalpies of formation of the plausible reaction products (metal tungstates, metal oxides, or metal carbonates), electronegativity of metals, and number of fluorine atoms in metal fluorides were established. These equations were suggested for the estimation of the enthalpies of formation of metal tungstates, metal oxides, or metal carbonates, for which experimental data are not available.

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Funding

DP and MPS gratefully acknowledge the Slovenian Research Agency (ARRS Grant P1-0045, Inorganic Chemistry and Technology) for financial support.

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Authors and Affiliations

  1. Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia

    Dona Pavlović & Maja Ponikvar-Svet

  2. Jožef Stefan International Postgraduate School, Jamova 39, SI-1000, Ljubljana, Slovenia

    Dona Pavlović & Maja Ponikvar-Svet

  3. Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, Baltimore, MD, 21250, USA

    Joel F. Liebman

Authors
  1. Dona Pavlović
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  2. Maja Ponikvar-Svet
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  3. Joel F. Liebman
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Correspondence to Maja Ponikvar-Svet or Joel F. Liebman.

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Pavlović, D., Ponikvar-Svet, M. & Liebman, J.F. Paradoxes and paradigms: observations on pyrohydrolysis, oxygen bomb combustion, and alkaline carbonate fusion, most frequently used decomposition methods for subsequent determination of fluorine and accompanying thermochemistry. Struct Chem 29, 1247–1254 (2018). https://doi.org/10.1007/s11224-018-1148-7

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  • DOI: https://doi.org/10.1007/s11224-018-1148-7

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