Mass spectrometric investigation of the vaporization of Li2TiO3(s)

The vaporization of Li2TiO3(s) has been investigated by the mass spectrometric Knudsen effusion method. Partial pressures of Li(g), LiO(g), Li2O(g), Li3O(g) and O2(g) over Li2TiO3(s) have been obtained in the temperature range 1180-1628 K. When the vaporization of Li2TiO3(s) proceeds, the content of Li2O in the Li2TiO3(s) sample decreases. The phase of the sample is a disordered Li2TiO3 solid solution above 1486 K. The enthalpies of formation and the atomization energies for LiO(g) and Li3O(g) have been evaluated from the partial pressures to be ΔHsub(f)00(LiO, g) = 65.4 +- 17.4 kJ/mol, ΔHsub(f)00(Li3O, g) = -207.5 +- 56.6 kJ/mol, D00(LiO) = 340.5 +- 17.4 kJ/mol and D00(Li3O) = 931.6 +- 56.6 kJ/mol, respectively. (orig.)