Abstract
The heat capacity of magnesium gallate MgGa2O4 was measured by adiabatic calorimetry (7–347K) and differential scanning calorimetry (322–1200K). Thermodynamic functions (heat capacity, entropy, enthalpy change and derived Gibbs energy) were calculated in the range 0–1200K. Gibbs energy of formation of MgGa2O4 was estimated using the standard entropy S0(298.15K) from this work: ΔfG0(MgGa2O4, 298.15 K)=−1594.3±4.3kJmol−1. The Debye characteristic temperature ΘD=750±20K was calculated from heat capacity data and from elastic constants.
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