Ceramics-Silikáty 21, (2) 111 - 116 (1977) |
|
MEASUREMENT OF THE TEMPERATURE DEPENDENCE OF ENTHALPY INCREASES OF CRYSTALLINE GADOLINIUM GERMANATE
|
Bondar Irinaida A. 1, Petrova Maja A. 1, Eliášová Mária 2,
Proks Ivo 2
|
1 Institut Khimii Silikatov im. I. V. Grebenshchikova AN SSSR, 199164, Leningrad, nab. Makarova 2
2 Institute of Inorganic Chemistry, Slovak Academy of Sciences, 809 34 Bratislava, Dúbravská cesta 5
|
The temperature dependence of the enthalpy increases was determined for crystalline Gd₂O₃. GeO₂ at temperatures between 1273 – 1873 K and at 298 K. Gadoliniuim oxyorthogermanate Gd₂O₃. GeO₂ was prepared by solid-state synthesis at 1673 K in a PtRh resistance furnace. On the basis of the measured temperature dependence ΔHc,T the isobaric temperature dependence of molar heats was established over the above temperature interval: Cp,c,T = 1.694 x 10-1 + 3.5890 x 10-5T [kJmol-1K-1]. A drop calorimeter was used for the measurements. |
 PDF (0.6 MB) |
|
