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1.
I. B. Bakhtiyarly D. Sh. Abdinov R. A. Ismaiyilova E. A. Geidarova 《Russian Journal of Inorganic Chemistry》2008,53(4):624-627
Phase equilibria in the Sb2Te3-Gd2Te3-Bi2Te3 ternary system have been studied using differential thermal analysis, namely, X-ray powder diffraction, microstructure examination, thermodynamic analysis, and microhardness and alloy density measurements. Phase diagrams of some polythermal joins and liquidus surface have been constructed. The regions of primary crystallization of phases and the coordinates of all invariant and univariant equilibria in the system under investigation have been established. 相似文献
2.
V. G. Grossman B. G. Bazarov Zh. G. Bazarova 《Russian Journal of Inorganic Chemistry》2008,53(11):1788-1794
The Tl2MoO4-Ln2(MoO4)3-Hf(MoO4)2 systems where Ln = La-Lu were studied in the subsolidus region using X-ray powder diffraction. Quasi-binary joins were revealed, and triangulation carried out. New ternary molybdates were prepared: Tl5LnHf(MoO4)6 (5: 1: 2) for Ln = Ce-Ho, Tl5LnHf(MoO4)6 (5: 1: 2) for Ln = Er-Lu, TlLnHf0.5(MoO4)3 (1: 1: 1) for Ln = Ce-Nd, and Tl2LnHf2(MoO4)6.5 (2: 1: 4) for Ln = Ce-Lu. The crystallographic parameters of Tl5LnHf(MoO4)6 (5: 1: 2) compounds for Ln = Er-Lu were determined. 相似文献
3.
D. M. Babanly G. M. Guseinov M. B. Babanly F. M. Sadygov 《Russian Journal of Inorganic Chemistry》2012,57(1):90-99
Phase equilibria in the Tl-TlI-S composition region of the Tl-S-I system were studied by differential thermal analysis, x-ray
powder diffraction, and measurements of the microhardness and the emf of concentration circuits relative to a thallium electrode.
A series of polythermal sections, an isothermal section at 300 K, and a projection of the liquidus surface were constructed.
Primary crystallization regions of six phases, including the ternary compounds Tl6SI4 and Tl3SI, were outlined, and the types and coordinates of non- and monovariant equilibria were determined. It was shown that the
ternary compound Tl6SI4 forms tie lines with Tl, TlI, Tl2S, Tl4S3, and TlS in the subsolidus region and that the homogeneity region of Tl6SI4 below 400 K does not exceed 1 mol %. From the emf measurement data, the standard thermodynamic functions of formation and
standard entropy of the compound Tl6SI4 were calculated: G
f,2980 = −601.7 ± 2.5 kJ/mol, ΔH
f,2980= −595.1 ± 4.0 kJ/mol, and S
2980 = 672 ± 10 J/(mol K). 相似文献
4.
N. B. Babanly Z. E. Salimov M. M. Akhmedov M. B. Babanly 《Russian Journal of Electrochemistry》2012,48(1):68-73
The EMF method with a solid Cu+-conducting electrolyte of Cu4RbCl3I2 was sued to study the Cu-Tl-Te system in the temperature range of 300–420 K. A diagram of solid-phase equilibriums of this
system is constructed, partial molar functions of copper in alloys, standard thermodynamic functions of formation and standard
entropies of CuTlTe2, CuTl4Te3, Cu2TlTe2, Cu3TlTe2, Cu9TlTe5 triple compounds and Cu
x
Tl5 − x
Te3 solid solutions (0 < x < 1) are calculated. The obtained results confirmed the assumption as to the possibility of using this modification for the
EMF technique for thermodynamic studies of copper-containing triple systems, even if they contain a less noble component than
copper. 相似文献
5.
D. M. Babanly Z. S. Aliev F. Ya. Dhafarli M. B. Babanly 《Russian Journal of Inorganic Chemistry》2011,56(3):442-449
The Tl-Te-Cl system was studied in the Tl-TlCl-Te composition region by differential thermal analysis, X-ray powder diffraction, and emf and microhardness measurements. A series of polythermal sections, an isothermal section at 400 K, and a projection of the liquidus surface of the phase diagram were constructed. The ternary compound Tl5Te2Cl characterized by a wide homogeneity region and incongruent melting by a syntectic reaction at 708 K was shown to exist. This compound was found to crystallize in tetragonal lattice (space group I4/mcm) with the parameters a = 8.921 Å, c = 12.692 Å, Z = 4. Wide phase separation regions were also found in the system, including a three-phase separation region in the Tl-TlCl-Tl2Te subsystem. Regions of primary crystallization of phases, and the types and coordinates of in- and monovariant equilibria in the T-x-y diagram were determined. From emf measurement data, the standard thermodynamic functions of formation and the standard entropy were calculated for the compound Tl5Te2Cl, as follows: ?ΔG 298 0 = 355.9 ± 1.1 kJ/mol, ?ΔH 298 0 = 377.1 ± 5.0 kJ/mol, and S 298 0 = 474.1 ± 6.8 J/(mol K). 相似文献
6.
T. V. Mikhailichenko L. A. Kalinina Yu. N. Ushakova G. I. Shirokova T. V. Tokareva 《Russian Journal of Electrochemistry》2011,47(5):556-562
The possibility of synthesizing complex sulfide phases in the BaSm2S4-Tm2S3 system has been studied. Tm2S3 solid solutions were obtained with BaSm2S4 (CaFe2O4 structural type). The samples were identified by X-ray diffraction analysis and electron microscopy. The range of the solid
solutions was determined. The total conductance was studied, and the conductance activation energy was calculated for samples
with different dopant contents. The electrolytic properties of basic ternary sulfide and complex sulfide phases in the BaSm2S4-x mol % Tm2S3 system were investigated. A possible mechanism of defect formation was proposed. 相似文献
7.
N. B. Babanly I. I. Aliev G. A. Azizov M. B. Babanly 《Russian Journal of Inorganic Chemistry》2007,52(1):126-128
The quasi-ternary system Tl2Se-AgTlSe-TlBiSe (A) has been investigated by DTA, X-ray powder diffraction, microstructural analysis, and microhardness measurements. Polythermal sections AgTlSe-TlBiSe2, AgTlSe-Tl9BiSe6, [Ag0.5Tl1.5Se]-TlBiSe2, Tl2Se-AgBiSe2 (0–50 mol % AgBiSe2), an isothermal section at 500 K, and the projection of the liquidus surface of system A have been constructed. It has been shown that the quasi-binary join AgTlSe-Tl9BiSe6 divides system A into two subordinate triangles, namely, Tl2Se-Tl9BiSe6-AgTlSe (B) and AgTlSe-Tl9BiSe6-TlBiSe2 (C). The phase diagram of subsystem B involves a univariant eutectic equilibrium while subsystem C involves an invariant eutectic equilibrium. The ternary eutectic has the coordinates 650 K, 10 mol % TlBiSe2, and 61 mol % AgTlSe. A continuous series of solid solutions (0–12 mol % AgTlSe) has been found along the Tl2Se-Tl9BiSe6 bordering system. The homogeneity region of TlBiSe2 extends to 5 mol %. 相似文献
8.
M. N. Sokolov A. V. Rogachev A. V. Virovets A. S. Bogomyakov 《Journal of Structural Chemistry》2018,59(1):126-130
Single crystals of Tl2[NbCl6] (1) and Tl2 [NbBr6] (2) are obtained as black needles on heating TlCl, Nb, S2Cl2 (1) and Tl, Nb, and Br2 at 400°C (2). Tl2NbBr6 also forms in the reaction of TlBr, Nb, Br2, and S at 500°C. Both compounds crystallize in the K2[PtCl6] structure type to form non-distorted octahedral [NbХ6]2– anions (Nb–Cl 2.397(4) Å and Nb–Br 2.516(2) Å). The magnetic properties of Tl2[NbBr6] in a range 5-300 K indicate an antiferromagnetic interaction between Nb4+ ion spins (d1, S = 1/2). On cooling, the compound becomes a noncollinear ferromagnet with Tc = 23 K. 相似文献
9.
The results concerning the synthesis, structure and thermal properties of V2O5-MoO3-Ag2O samples in the vanadium rich region of ternary system are presented in the form of quasi-binary phase diagrams in which
at constant V2O5/MoO3 molar ratios, equal 9:1, 7:3 and 1:1, the content of Ag2O was variable. A new ternary phase isostructural with NaVMoO6 has been detected in the investigated system. 相似文献
10.
L. Abbas L. Bih A. Nadiri Y. El Amraoui H. Khemakhem D. Mezzane 《Journal of Thermal Analysis and Calorimetry》2007,90(2):453-458
Thermal and chemical durability studies of the phosphate glasses belonging to the binary MoO3-P2O5 and the ternary K2O-MoO3-P2O5 systems are reported. The chemical resistant attack tests carried out on the free alkaline MoO3-P2O5 glasses show that the glass associated with the P/Mo ratio 2 has the high chemical durability. It shows also a high glass
transition temperature value. The above findings are interpreted in terms of the cross-link density of the glasses and the
strength of the M-O bonds (M=P, Mo).
The influence of K2O addition on the properties (density, T
g, durability) of this binary high water resistant glass is studied. It is found that the chemical durability along with the
other physical properties are reduced by the incroporation of K2O in the glass matrix. The results were explained by assuming the formation of non-bridging oxygens and weak bonds. The mechanism
of the dissolution of these glasses is proposed. 相似文献
11.
M. V. Moroz M. V. Prokhorenko S. V. Prokhorenko M. V. Yatskov O. V. Reshetnyak 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2018,92(1):19-23
Differential thermal analysis (DTA), X-ray diffraction (XRD), and electromotive force (EMF) are used to triangulate Ag–In–Te–I(Br) systems in the vicinity of compounds AgIn2Te3I and AgIn2Te3Br. The three-dimensional position of the AgIn2Te3I–InTe–Ag2Te–AgI and AgIn2Te3Br–InTe–Ag3TeBr phase areas with respect to the figurative points of silver is used to create equations of potential-determining chemical reactions. The potential-determining reactions are conducted in (?)C|Ag|Ag3GeS3I(Br) glass|D|C(+) electrochemical cells (ECCs), where C stands for inert (graphite) electrodes, Ag and D are ECC electrodes (D denotes alloys of one-, three-, and four-phase areas), and Ag3GeS3I and Ag3GeS3Br glasses are membranes with purely ionic Ag+ conductivity. Linear parts of the temperature dependences of the cell EMFs are used to calculate the standard integral thermodynamic functions of saturated solid solutions based on AgIn2Te3I and AgIn2Te3Br, and the relative partial thermodynamic functions of silver in the stoichiometric quaternary compounds. 相似文献
12.
A. M. Potapova G. V. Zimina I. N. Smirnova F. M. Spiridonov P. P. Fedorov 《Russian Journal of Inorganic Chemistry》2011,56(9):1453-1457
The 950°C isothermal section of the InPO4-Na3PO4-Li3PO4 ternary system was studied and constructed; one-, two, and three-phase fields are outlined. Five solid-solution regions exist
in the system: solid solutions based on the complex phosphate LiNa5(PO4)2 (olympite structure), the indium ion stabilized high-temperature Na3PO4 phase (Na3(1 − x)In
x
(PO4); space group Fm
[`3]\bar 3
m), the complex phosphate Na3In2(PO4)3, and the α and β phases of the compound Li3In2(PO4)3. A narrow region of melt was found in the vicinity of eutectic equilibria. All the phases detected in the system are derivatives
of phases existing in the binary subsystems. Isovalent substitution of lithium for sodium in Na3In2(PO4)3 leads to a significant increase in the region of a NASICON-like solid solution. 相似文献
13.
The results concerning the synthesis, structure and thermal properties of V2O5-MoO3-Ag2O samples in the molybdenum rich region of ternary system are presented in the form of quasi-binary systems: β-AgVO3-β-Ag2MoO4, AgVMoO6-MoO3, AgVMoO6-Ag2Mo4O13, AgVMoO6-Ag2Mo2O7, AgVMoO6-β-Ag2MoO4 and also of the system in which at V2O5/MoO3 molar ratio 3:7 the content of Ag2O was variable. The ternary phase AgVMoO6 was not described earlier in the literature. 相似文献
14.
I. B. Bakhtiyarly A. V. Neimatova F. M. Mamedov 《Russian Journal of Inorganic Chemistry》2010,55(4):620-625
Phase equilibria in the La2S3-Bi2S3-La2O3 ternary system were studied by differential thermal, X-ray powder diffraction, and microstructure analyses. Phase diagrams
of five vertical sections and a liquidus surface projection were plotted for the La2S3-Bi2S3-La2O3 system. The regions of primary crystallization of phases and coordinates of non- and monovariant equilibria were determined
for the system. 相似文献
15.
The electrolyses of solutions of bismuth oxide and tellurium oxide in nitric acid with molar ratios of Bi:Te=3:3–4:3 lead
to cathodic deposits of films of bismuth telluride (Bi2Te3), an n-type semiconductor. Current densities of 2–5 mA/cm2 were applied. Voltammetric investigations showed that Bi2Te3 deposition occurred at potentials more negative than −0.125 V (Ag/AgCl, 3 M KCl). The deposit was identified as bismuth telluride
(γ-phase) by X-ray analysis. Hall-effect measurements verified the n-type semiconducting behaviour. The films can be deposited
in microstructures for thermoelectric microdevices like thermoelectric batteries or thermoelectric sensors. 相似文献
16.
The paper summarizes the results concerning the different parts of the ternary system V2O5-MoO3-Ag2O and presents projection of the diagram on the basal triangle as well as its three-dimensional presentation of the diagram
drawn by the AutoCAD programme. 相似文献
17.
G. A. Bandurkin V. A. Krut’ko G. V. Lysanova M. G. Komova 《Russian Journal of Inorganic Chemistry》2011,56(1):82-92
The cationic networks in the structures of the initial oxides and all binary and ternary compounds forming in the Ln2O3-GeO2-P2O5 systems have been studied. In the phase diagrams of the Nd2O3-GeO2-P2O5 and Er2O3-GeO2-P2O5 systems, the regions of the structural influence of individual compounds with topologically identical cationic networks—anisotropic
(A), combined (C), and isotropic (I)—are united into common areas. The A: C: I area ratio is 1: 1: 1 in the neodymium system
and 1.7: 1: 3.4 in the erbium system. 相似文献
18.
The structure of the [Au(Dien)Cl]2[Re4Te4(CN)12]·5H2O compound prepared in an aqueous medium by the reaction of a gold(III) complex [Au(Dien)Cl]Cl2 with a tetranuclear tetrahedral tellurocyanide cluster complex of rhenium K4[Re4Te4(CN)12]·5H2O is determined by single crystal X-ray diffraction. 相似文献
19.
A. V. Egorysheva V. D. Volodin T. Milenov P. Rafailov V. M. Skorikov T. D. Dudkina 《Russian Journal of Inorganic Chemistry》2010,55(11):1810-1817
A physicochemical study of glasses based on the MO-Bi2O3-B2O3 and SrO-Bi2O3-B2O3 systems was performed. Glass formation regions were found. The structural and optical properties, as well as the thermal
behavior of the glasses, were studied. 相似文献
20.
Can five-membered Te<Subscript>2</Subscript>N<Subscript>2</Subscript>S rings be considered aromatic?
Nuno A. G. Bandeira Clémence Corminboeuf Maria José Calhorda 《Structural chemistry》2007,18(6):841-847
The structures and molecular properties of three cyclic tellurium species [Te2N2S]2+ (1
2+
), [Te2N2SCl]+ (1
+
), and Te2N2SCl2 (1) were studied using Density Functional Theory (DFT) with the aim of analyzing and quantifying the degree of electron delocalization
in the rings. The structural data for the AsF6− salt of the cation 1
+
, as well as the experimental vibrational frequencies of 1 and 1
+
, were compared to calculated structures and vibrational modes. While only the five-membered ring of 1
2+
obeys the classic Hückel aromaticity criteria, reflected in the nature of the π orbitals and natural resonance structures,
all the three species are magnetic aromatic according to nucleus-independent chemical shift (NICS). However, the out-of-plane
component of the NICS tensor (NICSzz) is able to provide a reliable characterization of the π aromatic character, by showing that successive binding of two chlorine
atoms to the same tellurium atom disrupts the π electron delocalization, and that total NICS cannot always be trusted as an
aromaticity indicator. 相似文献