Synthesis and Thermodynamic Properties of Germanate Tb2Ge2O7

Synthesis and Thermodynamic Properties of Germanate Tb2Ge2O7

Germanate Tb 2 Ge 2 O 7 has been prepared by solid-phase synthesis from a stoichiometric mixture of Tb 2 O 3 and GeO 2 by sequential firing in air at temperatures of 1273–1473 K. The effect of temperature on its molar heat capacity has been studied by differential scanning calorimetry. According to...

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Veröffentlicht in:Russian journal of inorganic chemistry 2019-07, Vol.64 (7), p.886-889
Hauptverfasser: Denisova, L. T., Kargin, Yu. F., Irtyugo, L. A., Belousova, N. V., Beletskii, V. V., Denisov, V. M.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Chemistry and Materials Science
Dependence
Enthalpy
Germanium oxides
Inorganic Chemistry
Physical Methods of Investigation
Solid phase synthesis
Solid phases
Temperature
Temperature effects
Thermodynamic properties
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Zusammenfassung:Germanate Tb 2 Ge 2 O 7 has been prepared by solid-phase synthesis from a stoichiometric mixture of Tb 2 O 3 and GeO 2 by sequential firing in air at temperatures of 1273–1473 K. The effect of temperature on its molar heat capacity has been studied by differential scanning calorimetry. According to the obtained dependence C p = f ( T ), the thermodynamic properties (enthalpy and entropy changes and the reduced Gibbs energy) have been calculated, and the specific heat value at 298 K has been estimated.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023619070052