Thermodynamic Characteristics of SmAlO₃ in the Range 55–300 K

Abstract

The heat capacity of SmAlO₃ is investigated for the first time in the temperature range 60–300 K by adiabatic calorimetry. The values of heat capacity, entropy, enthalpy, and reduced Gibbs energy are determined in standard conditions: С⁰_p(298,15 К) = 96,32 ± 0,39 J · mol^-1 x К^–1; S⁰(298,15 К) = 96,68 ± 0,77 J · mol^-1 · К^-1; Φ⁰(298,15 К) = 44,34 ± 0,67 J x mol^-1 · К^–1; H⁰(298,15 К) – H⁰(0 К)= 15604 ± 78 J · mol^-1. It is assumed that the R–O bond strength (R is a rare-earth metal) influences the heat capacity of perovskite-like aluminates.