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Low-temperature heat capacity and thermodynamic functions of dysprosium selenide Dy2Se3 Full article

Journal Thermochimica Acta
ISSN: 1872-762X , E-ISSN: 0040-6031
Output data Year: 2020, Volume: 686, Article number : 178551, Pages count : 5 DOI: 10.1016/j.tca.2020.178551
Tags Heat capacity Thermodynamic functions Dysprosium selenide Schottky anomaly
Authors Bespyatov M.A. 1 , Musikhin A.E. 1 , Zelenina L.N. 1 , Chusova T.P. 1 , Nikolaev R.E. 1 , Korolkov I.V. 1
Affiliations
1 Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences

Abstract: A sample of dysprosium selenide (Dy2Se3) was synthesized and characterized by various physicochemical methods. The heat capacity of Dy2Se3 has been measured in the temperature range from T=4.85 K to T=301.11 K using adiabatic calorimetry. Two pronounced λ-anomalies with maxima at temperatures TC1=6.20 K and TC2=219.40 K were found in the functional behavior of the heat capacity. In addition, the heat capacity of Dy2Se3(cr) showed a continuing excess value consistent with a Schottky anomaly on energy levels lying roughly from 0 to 425 cm−1 above the ground state. On the basis of experimental data on the heat capacity, the values of entropy, enthalpy and reduced Gibbs energy were calculated in the interval from T=0 to T=301 K, and the anomalous contribution to these properties was determined. The value of the absolute entropy obtained was used for calculation of Dy2Se3(cr) entropy formation at T=298.15 K.
Cite: Bespyatov M.A. , Musikhin A.E. , Zelenina L.N. , Chusova T.P. , Nikolaev R.E. , Korolkov I.V.
Low-temperature heat capacity and thermodynamic functions of dysprosium selenide Dy2Se3
Thermochimica Acta. 2020. V.686. 178551 :1-5. DOI: 10.1016/j.tca.2020.178551 WOS OpenAlex
Dates:
Submitted: Oct 30, 2019
Accepted: Feb 7, 2020
Published online: Feb 19, 2020
Identifiers:
Web of science: WOS:000528017000017
OpenAlex: W3007469216
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