Heat capacity of magnesium-neodymium hexaaluminate NdMgAl₁₁O₁₉

Heat capacity of magnesium-neodymium hexaaluminate NdMgAl11O19 with the magnetoplumbite structure is measured by relaxation, adiabatic, and differential scanning calorimetry in the temperature range 2-1850 K. Smoothing of the data is carried out after matching the temperature dependences of the heat capacity obtained by different methods. Thermodynamic functions (entropy and enthalpy change) are calculated, and the anomalous Schottky heat capacity in the low temperature region is estimated.