High-Temperature Mass Spectrometric Study of the WO3–ZnO System: Enthalpy of Reactions Involving Nonstoichiometric Phases

Abstract

The enthalpies of sublimation reactions of non-stoichiometric phases WO_2.985(s) and ZnWO_2.975(s) with the formation of gaseous oxides W₂O₆, W₃O₈, W₃O₉, W₄O₁₂ were obtained. It is shown that the difference with the enthalpies ​​obtained without taking into account deviations from stoichiometry is significantly less than the uncertainties of the enthalpies caused by high-temperature mass spectrometry method.