Heat Capacity and Thermodynamic Properties of Germanates CaR2Ge3O10 (R = Pr, Nd) in the Region of 320–1000 K
Sequential annealing of stoichiometric mixtures of CaCO 3 , Pr 6 O 11 (Nd 2 O 3 ), and GeO 2 in air at 1423–1473 K yields germanates CaPr 2 Ge 3 O 10 and CaNd 2 Ge 3 O 10 . Their crystal structure is refined via X-ray diffraction. The high-temperature heat capacity (320–1000 K) is measured by means...
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| Veröffentlicht in: | Russian Journal of Physical Chemistry A 2022-05, Vol.96 (5), p.913-917 |
|---|---|
| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Sequential annealing of stoichiometric mixtures of CaCO
3
, Pr
6
O
11
(Nd
2
O
3
), and GeO
2
in air at 1423–1473 K yields germanates CaPr
2
Ge
3
O
10
and CaNd
2
Ge
3
O
10
. Their crystal structure is refined via X-ray diffraction. The high-temperature heat capacity (320–1000 K) is measured by means of differential scanning calorimetry. The thermodynamic properties of germanates are calculated using experimental dependences
C
p
=
f(T). |
|---|---|
| ISSN: | 0036-0244 1531-863X |
| DOI: | 10.1134/S0036024422050077 |