Thermodynamic Properties of Sm2Hf2O7

Thermodynamic Properties of Sm2Hf2O7

Pyrochlore samarium hafnate was synthesized by reverse precipitation with final annealing at 1823 K, and identified by X-ray powder diffraction (XRD), chemical analysis, and electron microscopy. Relaxation calorimetry and adiabatic calorimetry were used to measure the molar heat capacity in the rang...

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Veröffentlicht in:Russian journal of inorganic chemistry 2021-10, Vol.66 (10), p.1512-1518
Hauptverfasser: Guskov, A. V., Gagarin, P. G., Guskov, V. N., Tyurin, A. V., Gavrichev, K. S.
Format: Artikel
Sprache:eng
Schlagworte:
Chemical analysis
Chemistry
Chemistry and Materials Science
Enthalpy
Heat measurement
Inorganic Chemistry
Low temperature
Physical Methods of Investigation
Samarium
Temperature dependence
Thermodynamic properties
X ray powder diffraction
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Beschreibung
Zusammenfassung:Pyrochlore samarium hafnate was synthesized by reverse precipitation with final annealing at 1823 K, and identified by X-ray powder diffraction (XRD), chemical analysis, and electron microscopy. Relaxation calorimetry and adiabatic calorimetry were used to measure the molar heat capacity in the range 4–347 K. The temperature-dependent entropy, enthalpy increment, and reduced Gibbs energy were calculated. The general form of the Schottky anomaly at low temperatures was determined.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023621100077