scholarly journals Thermodynamic properties of the GdTe3 compound

2021 ◽  
Vol 22 (3) ◽  
pp. 420-425
Author(s):  
Samira Imamaliyeva
Keyword(s):  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Standard Entropy ◽  
X Ray Diffraction ◽  
Emf Measurements ◽  
Standard Thermodynamic Functions ◽  
X Ray ◽  
Temperature Range ◽  
Concentration Cells ◽  
Thermodynamic Functions Of Formation

The alloys of the Gd-Te system in the range of compositions > 75 at% Te were studied by the methods of X-ray diffraction (XRD) and electromotive forces (EMF). From the EMF measurements of the concentration cells relative to the GdTe electrode in the 300-450 K temperature range, the partial thermodynamic functions of GdTe in alloys were determined. By combining these data with the corresponding functions of Gd in GdTe, the partial molar functions of gadolinium in GdTe3+Te alloys, and standard thermodynamic functions of formation and standard entropy of the GdTe3 compound were calculated. The obtained results were compared with the literature data.

scholarly journals Thermodynamic study of a synthetic analog of the famatinite mineral - Cu3SbS4

2021 ◽  
Vol 22 (1) ◽  
pp. 53-58
Author(s):  
P.R. Mammadli ◽  
L.F. Mashadiyeva ◽  
Z.T. Hasanova ◽  
D.M. Babanly
Keyword(s):  
Thermodynamic Functions ◽  
Measurement Data ◽  
Phase Region ◽  
S Phase ◽  
Synthetic Analog ◽  
Standard Entropy ◽  
Emf Measurements ◽  
Standard Thermodynamic Functions ◽  
First Time ◽  
Thermodynamic Functions Of Formation

Fundamental thermodynamic properties of the synthetic analog of the famatinite mineral - Cu3SbS4 were studied on the basis of electromotive force (EMF) measurements. The EMF of the concentration chains relative to the Cu electrode with a solid electrolyte was measured for the alloys from the Cu3SbS4 + Sb2S3 + S phase region at 300-380K temperature interval. Based on measurement data, the relative partial thermodynamic functions of copper in alloys, the standard thermodynamic functions of formation, as well as, the standard entropy of the Cu3SbS4 ternary compound were calculated for the first time.

scholarly journals Thermodynamıc Propertıes of the BiTe and Bi8Te9 Compounds

2020 ◽  
Vol 21 (4) ◽  
pp. 714-719
Author(s):  
G.S. Hasanova ◽  
A.I. Aghazade ◽  
Y.A. Yusibov ◽  
M.B. Babanly
Keyword(s):  
Comparative Analysis ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Partial Functions ◽  
Two Phase ◽  
Standard Thermodynamic Functions ◽  
Temperature Range ◽  
First Time ◽  
Thermodynamic Functions Of Formation

Two-phase alloys Bi8Te9+Bi4Te5 and BiTe+Bi8Te9 were studied by the electromotive forces method (EMF) in the temperature range 300-450 K. From the EMF data, the relative partial molar functions of bismuth in the alloys were calculated. The potential-forming reactions responsible for these partial functions were compiled, the values of the standard thermodynamic functions of formation, and the standard entropies of Bi8Te9 and BiTe compounds were calculated. A comparative analysis of the data for BiTe with the literature data was carried out; for Bi8Te9, the thermodynamic functions were obtained for the first time.

scholarly journals Thermodynamic Study of Tl6SBr4 Compound and Some Regularities in Thermodynamic Properties of Thallium Chalcohalides

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Dunya Mahammad Babanly ◽  
Qorkhmaz Mansur Huseynov ◽  
Ziya Saxaveddin Aliev ◽  
Dilgam Babir Tagiyev ◽  
Mahammad Baba Babanly
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Chemical Bonding ◽  
Electromotive Force ◽  
Solid Phase ◽  
Thermodynamic Study ◽  
Degree Of Ionization ◽  
Emf Measurements ◽  
Concentration Cells

The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.

scholarly journals Thermodynamic study of manganese tellurides by the electromotive force method

2021 ◽  
Vol 23 (2) ◽  
pp. 273-281
Author(s):  
Elnur N. Orujlu ◽  
Ziya S. Aliev ◽  
Yasin I. Jafarov ◽  
Eldar I. Ahmadov ◽  
Mahammad B. Babanly
Keyword(s):  
Electromotive Force ◽  
Liquid Electrolyte ◽  
X Ray Diffraction ◽  
Two Phase ◽  
Emf Measurements ◽  
Standard Thermodynamic Functions ◽  
X Ray ◽  
Force Method ◽  
Electromotive Force Method ◽  
Xrd Method

The thermodynamic properties of manganese tellurides were determined using an electromotive force (EMF) method with a liquid electrolyte in a temperature range from 300 to 450 K. EMF measurements were performed using equilibrium samples taken from the two-phase regions, namely MnTe2 + Te and MnTe + MnTe2, of the Mn–Te system. The phase compositions of all samples were controlled with the X-ray diffraction (XRD) method. The partial molar functions of manganese in alloys, as well as the standard thermodynamic functions of the formation and standard entropies of MnTe and MnTe2, were calculated. A comparative analysis of obtained results with literature data is performed

scholarly journals Thermodynamic study of the thallium-thulium tellurides by EMF method

2021 ◽  
Vol 102 (2) ◽  
pp. 43-52
Author(s):  
S.Z. Imamaliyeva ◽  
◽  
I.F. Mekhdiyeva ◽  
Y.I. Jafarov ◽  
M.B. Babanly ◽  
...  
Keyword(s):  
Phase Equilibria ◽  
Thermodynamic Functions ◽  
Solid Phase ◽  
Electrochemical Cells ◽  
X Ray Diffraction ◽  
Partial Functions ◽  
Standard Thermodynamic Functions ◽  
Phase Equi ◽  
First Time ◽  
Thermodynamic Functions Of Formation

In this study the phase equilibria in the Tl2Te–Tl2Te3–TlTmTe2compositions area of the Tl–Tm–Te ternary system were studied by powder X-ray diffraction (PXRD) analysis. Based on PXRD data, the solid-phase equi-libria diagram was plotted. The thermodynamic functions of the Tl9TmTe6and TlTmTe2ternary compounds were calculated by the electromotive forces method. The electrochemical cells of the following type (−) TmТе (s.) | glycerol + KCl + TmCl3 | (Tm in alloys of Tl–Tm–Te system) (s.) (+) were assembled and their EMF were measured in the 300-450 Ktemperature range. Based on obtained EMF data for the Tl2Te3–TlTe–TlTmTe2and TlTe–TlTmTe2–Tl9TmTe6three-phase regions, the relative partial thermodynamic functions of TmTe in alloys were calculated. The combination of these functions with the partial molar functions of thulium in TmTe allowed calculating the corresponding partial functions of thulium in the above phase regions. The potential-forming reactions responsible for the indicated partial molar values were obtained based on con-structed solid-phase equilibria diagram. Using indicated potential-forming reactions, for the first time, the standard thermodynamic functions of formation and standard entropies of the Tl9TmTe6and TlTmTe2 compounds were calculated.

scholarly journals THERMODYNAMIC PROPERTIES OF THE Sb2Te3 COMPOUND

2021 ◽  
Vol 0 (4) ◽  
pp. 53-59
Author(s):  
F.R. Aliyev ◽  
◽  
E.N. Orujlu ◽  
D.M. Babanly ◽  
◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Electromotive Force ◽  
Liquid Electrolyte ◽  
Emf Measurements ◽  
Temperature Range ◽  
First Time

Thermodynamic properties of the Sb2Te3 compound were studied by measuring electromotive force (EMF) with a liquid electrolyte in the temperature range of 300-450 K. The partial molar functions of antimony in alloys and the corresponding standard integral thermodynamic functions of the Sb2Te3 compound were calculated for the first time based on the EMF measurements under standard conditions. Comparative analysis of obtained results with literature data was carried out

scholarly journals THERMODYNAMIC FUNCTIONS OF FORMATION OF LITHIUM TITANATES

2021 ◽  
Vol 0 (4) ◽  
pp. 60-66
Author(s):  
U.N. Sharifova ◽  
Keyword(s):  
Free Energy ◽  
Enthalpy Of Formation ◽  
Thermodynamic Functions ◽  
Standard Entropy ◽  
Standard State ◽  
Temperature Range ◽  
Lithium Glass ◽  
Binary Compounds ◽  
First Time ◽  
Thermodynamic Functions Of Formation

By the method of electromotive forces measuring concentration chains: Pt│Li2O│ ZrO2+10 wt% Y2O3, lithium glass. (Li2O)x(TiO2)1-x│Pt in the temperature range T=1000–1200K and concentrations 0.35÷0.95 mol fraction TiO2, the thermodynamic functions of the formation of the compounds Li4TiO4, Li2TiO3, Li4Ti5O12 and phases based on Li2TiO3:Li1.92Ti1.04O3.04, Li2.12Ti0.94O2.92 were determined. With the exception of the compound Li2TiO3, the thermodynamic functions of the formation of lithium titanates are deter¬mined for the first time. The thermodynamic functions of formation are calculated for the 1200 K and for the standard state at 298 K. The thermodynamic functions of the formation of lithium titanates are determined from simple substances and from binary compounds Li2O and TiO2. In particular, for the free energy, enthalpy of formation and standard entropy we obtained: ∆G_298^0(Li4TiO4)=–2149 kJ∙mol-1; ∆G_298^0(Li2TiO3)=–1565; ∆G_298^0(Li4Ti5O12)=–5923; ∆H_298^0(Li4TiO4)=–2286 kJ∙mol-1; ∆H_298^0(Li2TiO3)=–1662; ∆H_298^0(Li4Ti5O12)=–6287; S_298^0(Li4TiO4)=119.1 J∙mol-1∙K-1; S_298^0(Li2TiO3)=84; S_298^0(Li4Ti5O12)=315.7

scholarly journals Thermodynamic investigations of the erbium tellurides by EMF method

2020 ◽  
Vol 21 (2) ◽  
pp. 312-318
Author(s):  
S. Z. Imamaliyeva ◽  
I. F. Mehdiyeva ◽  
D. B. Taghiyev ◽  
M. B. Babanly
Keyword(s):  
Comparative Analysis ◽  
Thermodynamic Functions ◽  
Thermodynamic Study ◽  
Emf Method ◽  
Emf Measurements ◽  
Temperature Range ◽  
Concentration Cells

The work presents the results of a thermodynamic study of the Er-Te system by the method of electromotive forces (EMF) in the temperature range of 300-450 K. From the EMF measurements of the concentration cells relative to the Er and ErTe electrodes, the partial thermodynamic functions of ErTe and Er in the alloys are determined, based on which the standard thermodynamic formation functions and the standard entropies of the intermediate compounds ErTe3, Er2Te3, and ErTe are calculated. A comparative analysis of the obtained data with the literature is carried out.

Theoretically derived thermodynamic properties can be improved by the refinement of low-frequency modes against X-ray diffraction data

2021 ◽  
Author(s):  
Anna Agnieszka Hoser ◽  
Marcin Sztylko ◽  
Damian Trzybiński ◽  
Anders Østergaard Madsen
Keyword(s):  
Thermodynamic Properties ◽  
Dft Calculations ◽  
Diffraction Data ◽  
Molecular Crystals ◽  
Low Frequency ◽  
X Ray Diffraction ◽  
X Ray ◽  
Efficient Approach

A framework for estimation of thermodynamic properties for molecular crystals via refinement of frequencies from DFT calculations against X-ray diffraction data is presented. The framework provides an efficient approach to...

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