High-Temperature Heat Capacity of the PrFeGe 2 O 7 and NdFeGe 2 O 7 Germanates in the Range 350–1000 K

The PrFeGe2O7 and NdFeGe2O7 germanates have been prepared by solid-state reactions using stoichiometric mixtures of Pr2O3 (Nd2O3), Fe2O3, and GeO2 as starting oxides, which were sequentially fired between 1273 and 1473 K in air, and their high-temperature heat capacity has been determined by differential scanning calorimetry. The experimental Cp(T) data obtained have been used to evaluate their thermodynamic properties.