Mass spectrometric study of the thermochemistry of gaseous EuTiO3 and TiO2

Abstract

The gaseous molecule EuTiO3 has been investigated in a high temperature mass spectrometric study of vapors over the europium–titanium–oxygen system. From the enthalpy of reaction: EuTiO3(g)=EuO(g)+TiO2(g) and proper ancillary data, the atomization energy of this molecule has been determined. In addition, from the study of the gaseous exchange reaction: TiO2(g)+Eu(g)=TiO(g)+EuO(g) the dissociation energy of TiO2(g) has been derived and compared with previous results. The dissociation energies proposed are: D○0,at(EuTiO3) =2278±28 kJ mol−1 and D○0,at(TiO2) =1260±12 kJ mol−1.