Thermodynamic Properties of Zincate-Manganites of LaM2IIZnMnO6 (МII = Mg, Ca, Sr, Ba) Composition
- Authors: Kasenov B.K.1, Kasenova S.B.1, Sagintaeva Z.I.1, Seisenova A.A.1, Turtubaeva M.O.2, Kuanyshbekov E.E.2, Ermaganbetov K.T.2
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Affiliations:
- Abishev Institute of Chemical Metallurgy
- Buketov Karaganda State University
- Issue: Vol 90, No 4 (2016)
- Pages: 739-743
- Section: Chemical Thermodynamics and Thermochemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/167996
- DOI: https://doi.org/10.1134/S0036024416040117
- ID: 167996
Cite item
Abstract
Temperature dependences of the heat capacity of new zincate-manganites of LaM2IIZnMnO6 (MII = Mg, Ca, Sr, Ba) composition are studied via experimental calorimetry in the interval of 298.15–673 K. It is found that all compounds have λ-shape effects on the curve of dependence Cp° ~ ƒ(T) with respect to phase transitions of the second kind. Equations for the temperature dependence of the heat capacity are derived with allowance for phase transition temperatures, and thermodynamic functions H°(T) − H°(298.15), S°(T) and Φxx(T) are calculated on the basis of experimental data on Cp°(T) and the calculated S°(298.15) value.
About the authors
B. K. Kasenov
Abishev Institute of Chemical Metallurgy
Author for correspondence.
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 100009
Sh. B. Kasenova
Abishev Institute of Chemical Metallurgy
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 100009
Zh. I. Sagintaeva
Abishev Institute of Chemical Metallurgy
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 100009
A. A. Seisenova
Abishev Institute of Chemical Metallurgy
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 100009
M. O. Turtubaeva
Buketov Karaganda State University
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 470075
E. E. Kuanyshbekov
Buketov Karaganda State University
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 470075
K. T. Ermaganbetov
Buketov Karaganda State University
Email: kasenov1946@mail.ru
Kazakhstan, Karaganda, 470075