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1.
D. M. Babanly S. V. Askerova M. B. Babanly Yu. A. Yusibov 《Russian Journal of Inorganic Chemistry》2011,56(7):1114-1118
Phase equilibria in the Tl5Te3-Tl9BiTe6-Tl5Te2Br system were studied by differential thermal analysis, X-ray powder diffraction, and measurements of microhardness and also
emf relative to a thallium electrode. Polythermal and isothermal sections of the phase diagram at 760 and 800 K, and projections
of the liquidus and solidus surfaces were constructed. The unit cell parameters, microhardness, and emf in the alloys were
described as functions of concentration. The system is characterized by the formation of complete solid solutions with the
Tl5Te3 structure. 相似文献
2.
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
3.
The Tl-TlBr-Te composition region of the Tl-Te-Br phase diagram has been explored by DTA, X-ray diffraction, microhardness
measurements, and electromotive force (emf) measurements relative to a thallium electrode in concentrations cells. The phase
diagrams along a number of joins, the isothermal section at 400 K of the phase diagram, and a projection of the liquidus surface
have been constructed. Extensive phase-separation areas, including a three-liquid-phase field in the Tl-TlBr-Tl2Te subsystem, have been revealed. The homogeneity ranges and primary crystallization fields of phases have been mapped, and
the coordinates of nonvariant and univariant equilibria in the T-x-y diagram have been determined. The standard thermodynamic functions of formation of the Tl5Te2Br compound and its standard entropy have been derived from emf data. 相似文献
4.
D. M. Babanly S. V. Askerova Z. S. Aliev M. B. Babanly 《Russian Journal of Inorganic Chemistry》2011,56(11):1833-1838
Phase equilibria in the Tl5Te3-Tl9BiTe6-Tl5Te2Cl system were studied by differential thermal analysis (DTA), X-ray powder diffraction, and measurements of microhardness
and also emf of concentration circuits with reference to a thallium electrode. A number of polythermal sections, the isothermal
sections of the phase diagram at 760 and 800 K, and projections of the liquidus and solidus surfaces were constructed. It
was shown that the system is characterized by the formation of unlimited solid solutions with the Tl5Te3 structure. The concentration dependences of the crystal lattice parameters, microhardness, and emf in the solid solutions
were described. 相似文献
5.
121Sb, 123Sb, 75As, 63Cu, and 65Cu NQR resonances are reported for CuSbSe2, Tl3SbSe3, Tl3SbS3, Tl3AsS3, Tl3AsSe3, Ag3AsSe3, TlSbS2, CuAsS, AgAsS, and Cu5SbS3I2. Tl3SbSe3 is an incongruently melting compound not observed in an earlier phase-diagram study of the pseudobinary system Tl2SeSb2Se3. For isostructural arsenic and antimony chalcogenides the ratio of 75As to 121Sb quadrupole coupling constants is 0.42, and for the BX3 group in binary or ternary corresponding pairs of sulfide and selenides the ratio of quadrupole coupling constants for 75As or 121Sb is 0.83. A reversible phase transition was observed at 130 K for Ag3AsSe3. Unit cell parameters are reported for crystals of TlSbS2 and Cu5SbS3I2. 相似文献
6.
M. B. Babanly L. F. Mashadieva G. M. Velieva S. Z. Imamalieva Yu. M. Shykhyev 《Russian Journal of Electrochemistry》2009,45(4):399-404
The EMF method with a solid Ag4RbI5 superionic conductor was used to study the Ag-As-Se and Ag-S-I systems in the composition ranges of Ag2Se-As2Se3-Se and Ag2S-AgI-S, accordingly. Their solid-phase equilibrium diagrams are constructed or specified. The existence of ternary AgAs3Se5, AgAsSe2, Ag3AsSe3, Ag7AsSe6, Ag3SI compounds is confirmed. The standard partial and integral thermodynamic formation functions and also standard entropies were calculated for these compounds for the first time. 相似文献
7.
Ya. I. Dzhafarov A. M. Mirzoeva M. B. Babanly 《Russian Journal of Inorganic Chemistry》2006,51(5):805-809
The reciprocal system 3Tl2S + Bi2Se3 ? 3Tl2Se + Bi2S3 has been investigated by DTA, X-ray powder diffraction analysis, and emf measurements. Some polythermal sections and the isothermal section at 500 K of the phase diagram and the projection of the liquidus surface of this system have been constructed, and the types and coordinates of the invariant and univariant equilibria have been determined. The existence of wide regions of quaternary solid solutions based on the binary compounds Tl2S, Tl2Se, Bi2S3, and Bi2Se3, and solid solutions between the temary compounds TlBiS2 and TlBiSe2 have been established. 相似文献
8.
D. M. Babanly I. I. Aliev K. N. Babanly Yu. A. Yusibov 《Russian Journal of Inorganic Chemistry》2011,56(9):1472-1477
Phase equilibria in the Ag2Te-PbTe-Bi2Te3 quasi-ternary system were studied by differential thermal analysis, X-ray powder diffraction, and measurements of microhardness
and emf of concentration circuits with an Ag4RbI5 solid electrolyte. Some polythermal sections and isothermal (600 and 800 K) sections of the phase diagram, and also a projection
of the liquidus surface were constructed. The primary crystallization fields of phases were determined, and the types and
coordinates of invariant and monovariant equilibria were found. The system is characterized by the formation of a wide continuous
band of high-temperature solid solutions (γ phase) with a cubic structure along the PbTe-AgBiTe2 section. With decreasing temperature (T ≤ 715 K), AgBiTe2 and γ solid solutions, close in composition to this compound, experience solid-phase decomposition to form Bi2Te3, ternary tetradymite-like phases of the PbTe-Bi2Te3 boundary system, and the low-temperature phase of Ag2Te. 相似文献
9.
D. M. Babanly Yu. A. Yusibov M. B. Babanly 《Russian Journal of Inorganic Chemistry》2007,52(5):753-760
Phase equilibria in the system Tl-Se-Cl were studied in the region Tl-TlCl-Se by DTA, X-ray powder diffraction, emf measurements
concentration circuits (−) Tl/glycerol + KCl + TlCl/(Tl-Se-Ce) (+), and microhardness measurements. Several vertical sections,
an isothermal section at 400 K, and the liquidus-surface projection were constructed. The primary crystallization regions
and homogeneity regions of phases were determined, including the α phase of variable composition based on Tl5Se2Cl, the only ternary compound of the system. The types and coordinates of invariant and monovariant equilibria on the T-x-y diagram were determined. From the results of emf measurements, the standard thermodynamic functions of formation and the
standard entropy were calculated for the compound Tl5Se2Cl.
Original Russian Text ¢ D.M. Babanly, Yu.A. Yusibov, M.B. Babanly, 2007, published in Zhurnal Neorganicheskoi Khimii, 2007,
Vol. 52, No. 5, pp. 819–826. 相似文献
10.
The phase diagram Cu2SeAs2Se3 was investigated by thermal and X-ray methods. Cu2Se has a limited solubility for As2Se3 (5 mole% at 769 K). The stoichiometric compound Cu3AsSe3 exists between 696 and 769 K. Cu4As2Se5, a phase at 66.6 mole% Cu2Se, decomposes peritectically at 746 K. The narrow homogeneity range (4 mole% at 683 K) extends far into the ternary space. CuAsSe2 also decomposes peritectically at 683 K. A degenerated eutectic between CuAsSe2 and As2Se3 was found at 641 K. Single crystals of Cu4As2Se5 were grown in a salt melt. A metastable modification of the high-temperature phase Cu3AsSe3 can be obtained by quenching. Cu4As2Se5 (space group R3, lattice constants a = 1404.0(1) pm, c = 960.2(1) pm), Cu6As4Se9, obtained by Cambi and Elli, and Cu7As6Se13 of Takeuchi and Horiuchi are different versions of a sphalerite-type compound with a broad homogeneity range in the system CuAsSe. CuAsSe2 is possibly monoclinic with lattice parameters of a = 946.5(1) pm, b = 1229.3(1) pm, c = 511.7(1) pm, and β = 98.546(4)°. The enthalpy of mixing of Cu2Se and As2Se3 in the liquid state is endothermic. 相似文献
11.
R.L. Ammlung D.F. Shriver M. Kamimoto D.H. Whitmore 《Journal of solid state chemistry》1977,21(3):185-193
The new compound Tl2ZnI4 has been prepared and characterized by Raman spectroscopy, powder X-ray diffraction, elemental analyses, and a partial binary phase diagram. The compounds In4CdI6, Tl4CdI6, and In2ZnI4, for which phase diagrams are available in the literature, were characterized by Raman spectroscopy and their identities were confirmed by elemental analyses and X-ray powder diffraction. Each of these materials, except Tl4CdI6, undergoes a sharp order-disorder phase transition at elevated temperatures that can be detected by the measurement of Raman spectra as a function of temperature. Conductivity measurements as a function of temperature, using both reversible and blocking electrodes, reveal a high ionic conductivity in the disordered, high-temperature phase. This work suggests that indium(I) and thallium(I) ionic conductors may exist, analogous to some well-known double salt conductors based on simple silver(I) and copper(I) halides. In addition, the present study demonstrates the usefulness of Raman spectroscopy in the characterization of heavy-metal ionic conductors. 相似文献
12.
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
13.
F. N. Guseinov K. N. Babanly I. I. Aliev M. B. Babanly 《Russian Journal of Inorganic Chemistry》2012,57(1):100-103
The Pb-Bi-Se system in the PbSe-Bi2Se3-Se-Se composition region was studied by measurement of concentration circuits of the type (−) PbSe(solid) liquid electrolyte,
Pb2+(Pb-Bi-Se)(solid) (+) in the temperature range 300–430 K and by X-ray powder diffraction. A solid-phase equilibrium diagram
was constructed, and the formation was confirmed for the ternary compounds Pb5Bi6Se14, Pb5Bi12Se23, and Pb5Bi18Se32, which belong to the homologous series [(PbSe)5]
m
· [(Bi2Se3)3]
n
. From the emf versus temperature equations, the partial thermodynamic functions [`(DG)]\overline {\Delta G}, [`(DH)]\overline {\Delta H}, [`(DS)]\overline {\Delta S} of PbSe in alloys were calculated. Based on the solid-phase equilibrium diagram from these partial molar quantities using
the corresponding data for PbSe and Bi2Se3, the standard thermodynamic functions of formation and standard entropies of the above ternary compounds were calculated. 相似文献
14.
Hyunjin Bang 《Journal of solid state chemistry》2008,181(8):1798-1802
We found new synthetic routes to obtain 1-D quaternary thiophosphate compounds and a 0-D molecular complex containing a Nb2S4 core from a 2-D ternary thiophosphate, Nb4P2S21. When Nb4P2S21 was reacted with alkali metal halides (ACl; A=Na, K, Rb, Cs) or TlCl at 500-700 °C, the -S-S-S- bridges in 2-D Nb2PS10-S-S10PNb2 were excised to form a 1-D chain, and cations were inserted between the chains to form ANb2PS10 (A=Na, K, Rb, Cs, Tl). We also found that thallium chloride (TlCl) is an excellent reagent for further excision, and it substitutes chloride ligands for the sulfur ligands of 2-D Nb4P2S21 to form the molecular complex Tl5[Nb2S4Cl8]Cl. Crystal data for TlNb2PS10: monoclinic, Pn, a=6.9452(11) Å, b=7.3761(12) Å, 12.873(2) Å, β=104.472(3)°, and Z=2. Crystal data for Tl5[Nb2S4Cl8]Cl: orthorhombic, Immm, a=7.001(5) Å, b=9.509(7) Å, c=15.546(11) Å, and Z=2. 相似文献
15.
Tin-119 Mössbauer spectra have been recorded at liquid nitrogen and room temperatures for ternary sulfides isolated from the systems SnSBaS and SnSTl2S. The chemical isomer shifts observed (2.8 – 3.4 mm/sec relative to BaSnO3 at 293 K) are characteristic of divalent tin compounds. The data are consistent with the known structures of these compounds and are discussed with regard to the stereochemical activity of the tin(II) lone pair of electrons. For Tl2Sn2S3 and Tl4SnS3 the Mössbauer parameters are interpreted in terms of direct population of conductance bands by nonbonding electron pairs. 相似文献
16.
The Tl2TlOH(SO4)2 compound is monoclinic, a = 7.758 (3), b = 17.587 (9), c = 7.356 (3) Å, β = 119.91 (3)°, S. G. Cc, Z = 4. The structure was solved by full-matrix least square refinement to R = 0.033 from 1242 single-crystal reflections collected on an automated diffractometer. Tl+ ions ensure bonding between [TlIIIOH(SO4)2]∞ sheets. These sheets may be viewed as criss-crossing TlSO4 chains. In the [101] direction, the linking of TlIII is reinforced by bidentate OH groups, so the usual hexacoordination of trivalent thallium is preserved. A transition occurring at 104°C is under investigation. 相似文献
17.
M. B. Babanly V. P. Zlomanov F. N. Guseinov G. B. Dashdyeva 《Russian Journal of Inorganic Chemistry》2011,56(12):1981-1987
phase equilibria in the Tl2Te-SnTe-Bi2Te3 system were studied by differential thermal analysis (DTA), X-ray powder diffraction, and microhardness measurements. Some
polythermal sections and isothermal (at 600 and 800 K) sections of the phase diagram and a projection of the liquidus surface
were constructed. It was shown that the system is characterized by the formation of solid solutions with the Tl5Te3 structure (δ) and solid solutions based on SnTe (γ1), Tl2Te (α), Bi2Te3 (β), and two TlBiTe2 (γ2 and γ′2) phases. Their homogeneity regions were determined. The liquidus surface consists of the primary crystallization fields of
the β-, γ1-, γ′2-, and δ phases and the compounds SnBi2Te4 and SnBi4Te7. The liquidus of the α phase is degenerate. The primary crystallization fields of phases were determined, and the types and
coordinates of in- and monovariant equilibria were found. 相似文献
18.
The standard free energy of formation of YbFe2O4, Yb2Fe3O7, YbFeO3, and Yb3Fe5O12 from metallic iron, Yb2O3, and oxygen was determined to be ?100.38, ?158.38, ?58.17, and ?283.40 kcal/mole, respectively, at 1200°C on the basis of the phase equilibria in the FeFe2O3Yb2O3 system. The FeFe2O3-Lanthanoid sesquioxide systems were classified into four types with respect to the assemblage of the ternary compounds in stable existence at 1200°C, and the standard free energy of formation of YbFeO3 was compared with those of the other lanthanoid-iron perovskites. 相似文献
19.
Jeongho Yeon 《Journal of solid state chemistry》2009,182(12):3269-6993
Two new thallium iodates have been synthesized, Tl(IO3)3 and Tl4(IO3)6 [Tl+3Tl3+(IO3)6], and characterized by single-crystal X-ray diffraction. Both materials were synthesized as phase-pure compounds through hydrothermal techniques using Tl2CO3 and HIO3 as reagents. The materials crystallize in space groups R-3 (Tl(IO3)3) and P-1 (Tl4(IO3)6). Although lone-pairs are observed for both I5+ and Tl+, electronic structure calculations indicate the lone-pair on I5+ is stereo-active, whereas the lone-pair on Tl+ is inert. 相似文献
20.
S.K. Rakshit S.C. Parida S. Dash Z. Singh B.K. Sen V. Venugopal 《Journal of solid state chemistry》2007,180(2):523-532
The citrate-nitrate gel combustion route was used to prepare SrFe2O4(s), Sr2Fe2O5(s) and Sr3Fe2O6(s) powders and the compounds were characterized by X-ray diffraction analysis. Different solid-state electrochemical cells were used for the measurement of emf as a function of temperature from 970 to 1151 K. The standard molar Gibbs energies of formation of these ternary oxides were calculated as a function of temperature from the emf data and are represented as (SrFe2O4, s, T)/kJ mol−1 (±1.7)=−1494.8+0.3754 (T/K) (970?T/K?1151). (Sr2Fe2O5, s, T)/kJ mol−1 (±3.0)=−2119.3+0.4461 (T/K) (970?T/K?1149). (Sr3Fe2O6, s, T)/kJ mol−1 (±7.3)=−2719.8+0.4974 (T/K) (969?T/K?1150).Standard molar heat capacities of these ternary oxides were determined from 310 to 820 K using a heat flux type differential scanning calorimeter (DSC). Based on second law analysis and using the thermodynamic database FactSage software, thermodynamic functions such as ΔfH°(298.15 K), S°(298.15 K) S°(T), Cp°(T), H°(T), {H°(T)-H°(298.15 K)}, G°(T), free energy function (fef), ΔfH°(T) and ΔfG°(T) for these ternary oxides were also calculated from 298 to 1000 K. 相似文献