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Oxides Y0.65Pr0.35BiGeO5 and Y0.65Nd0.35BiGeO5 have been synthesized by a ceramic method. The heat capacity of fine crystalline samples has been studied in the range 350-1000 K by differential scanning calorimetry. The Cp = f(T) dependences can be described by the Maier-Kelley equation. The thermodynamic functions of these oxides—changes in enthalpy, entropy, and reduced Gibbs energy—have been calculated from the experimental data on high-temperature heat capacity. [ABSTRACT FROM AUTHOR]

ErInGe2O7 and TbInGe2O7 have been synthesized from the parent oxides by a ceramic method through the multistep annealing in air in the temperature range 1273–1473 K. The high-temperature heat capacity of these oxides has been measured by the differential scanning calorimetry method (350–1000 K). Their thermodynamic properties have been calculated from the experimental dependences Cp = f(T). [ABSTRACT FROM AUTHOR]

The effect of temperature within the range 379-1026 K on the specific heat of thulium orthovanadate TmVO obtained by solid-phase synthesis was studied by differential scanning calorimetry. From the experimental dependence C = f( T), which is described by the equation C = (136.46±0.47) + (15.5±0.5) × 10 T - (17.5±0.6) × 10T, the thermodynamic functions of the oxide compound were calculated. [ABSTRACT FROM AUTHOR]