Abstract
The recent results on the thermodynamic properties such as heat capacity, vapor pressure, partial molar enthalpy and entropy of oxygen, and standard molar enthalpy of formation of phases in the V-O and Nb-O systems are reviewed including the recent results obtained in our laboratory by using adiabatic scanning calorimeter, direct-heating pulse calorimeter, Tian-Calvet-type calorimeter, electrochemical cell and mass spectrometer.
