“…This review brings a summary of our results [20][21][22][23][24][25][26][27][28][29][30] focused on calorimetric determination of heat capacity, entropy end enthalpy of mixed oxides in the system CaO-SrO-Bi2O3-Nb2O5-Ta2O5. Temperature dependences of molar heat capacity in a broad temperature range were evaluated from the experimental heat capacity and relative enthalpy data.…”