By the method of electromotive forces measuring concentration chains: Pt│Li₂O│ ZrO₂+10 wt% Y₂O₃, lithium glass. (Li₂O)_x(TiO₂)_1-x│Pt in the temperature range T=1000–1200K and concentrations 0.35÷0.95 mol fraction TiO₂, the thermodynamic functions of the formation of the compounds Li₄TiO₄, Li₂TiO₃, Li₄Ti₅O₁₂ and phases based on Li₂TiO₃:Li_1.92Ti_1.04O_3.04, Li_2.12Ti_0.94O_2.92 were determined. With the exception of the compound Li₂TiO₃, the thermodynamic functions of the formation of lithium titanates are deter­mined for the first time. The thermodynamic functions of formation are calculated for the 1200 K and for the standard state at 298 K. The thermodynamic functions of the formation of lithium titanates are determined from simple substances and from binary compounds Li₂O and TiO₂. In particular, for the free energy, enthalpy of formation and standard entropy we obtained: (Li₄TiO₄)=–2149 kJ∙mol^-1; (Li₂TiO₃)=–1565; (Li₄Ti₅O₁₂)=–5923; (Li₄TiO₄)=–2286 kJ∙mol^-1; (Li₂TiO₃)=–1662; (Li₄Ti₅O₁₂)=–6287; (Li₄TiO₄)=119.1 J∙mol^-1∙K^-1; (Li₂TiO₃)=84; (Li₄Ti₅O₁₂)=315.7

doi.org/10.32737/0005-2531-2021-4-60-66