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1
The Quasi-ternary CdSe–Ga2Se3–Sb2Se3 System
Sosovska S., Olekseyuk I., Parasyuk O.
Polish Journal of Chemistry
|
2007
|
Vol. 81, nr 4
505-513
EN
Differential thermal analysis, X-ray diffraction, and metallography were used to study the interaction between the components of the quasi-ternary CdSe–Ga2Se3–Sb2Se3 system. Phase diagrams of three vertical sections, an isothermal section at 670K, aswell as a projection of the liquidus surface have been constructed. The type of mono- and invariant processes in the system has been investigated and the coordinates of invariant points have been determined. Present results can be employed for the growth of CdGa2Se4 single crystals from non-stoichiometric melts.
2
Investigation of the Y2S3-PbS-SnS2 System at 770 K
Marchuk O., Ruda I., Gulay L., Olekseyuk I.
Polish Journal of Chemistry
|
2007
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Vol. 81, nr 3
425-432
EN
The interactions between the components in the Y2S3-PbS-SnS2 system at 770 K were determined using X-ray powder diffraction. The existence of the Y2PbS4 (unknown structure) compound in the Y2S3-PbS section and the PbSnS3 (PbSnS3 structure type, space group Pnma) compound in the PbS-SnS2 section was confirmed. No compounds were observed in the Y2S3-SnS2 section. The crystal structure of new quaternary Y2Pb3Sn3S12 (space group Pmc21, a = 0.39021(2) nm, b = 2.01003(8) nm, c = 1.15169(5) nm, RI = 0.0872) compound in the Y2S3-PbS-SnS2 system at 770 K was investigated using X-ray powder diffraction.
3
Phase Equilibria in the Cu2S-{Sb,Bi}2S3-Ga2S3 and Cu2S-{Sb,Bi}2S3-In2S3 Systems at 673 K
Olekseyuk I., Zhbankov O., Kumanska Y., Tkachuk V.
Polish Journal of Chemistry
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2006
|
Vol. 80, nr 5
817-823
EN
Phase equilibria in the Cu2S-{Sb,Bi}2S3-Ga2S3 and Cu2S-{Sb,Bi}2S3-In2S3 systems at 673 K were investigated by X-ray powder diffraction and their isothermal sections were constructed. No quaternary compounds or continuous solid solutions were found. The homogeneity region of the CuIn5S8 phase in quasibinary Cu2S-In2S3 system was determined in the range 7.3-17.2mol.% Cu2S. The Rietveld refinement of the crystal structure CuGa5S8 has been performed, using powder diffraction pattern in the zinc blende model (SG F43m, a = 0.52246(2) nm).
4
Isothermal Section of the Y2Se3-Cu2Se-GeSe2 System at 870 K and Crystal Structure of the Y3CuGeSe7 Compound
Lychmanyuk O., Gulay L., Olekseyuk I.
Polish Journal of Chemistry
|
2006
|
Vol. 80, nr 3
463-469
EN
The Y2Se3-Cu2Se-GeSe2 system was investigated using X-ray powder diffraction. The existence of the Y(2+x)/3Cu2-xSe2 (0 _ x _ 1) solid solution (Er2/3Cu2S2 structure type, space group P3) was confirmed in the Y2Se3-Cu2Se section. No compounds were found in the Y2Se3-GeSe2 section. The formation of the Cu8GeSe6 (Cu8GeSe6 structure type, space group P63cm) and Cu2GeSe3 (Cu2GeSe3 structure type, space group Imm2) compounds was confirmed in the Cu2Se-GeSe2 section. The isothermal section of the Y2Se3-Cu2Se-GeSe2 system at 870 K was constructed, based on data of the phase analysis of 54 samples. The formation of new quaternary Y3CuGeSe7 compound (La3CuSiS7 structure type, space group P63, a = 1.02368(8) nm, c = 0.60569(3) nm) was established in the Y2Se3-Cu2Se-GeSe2 system.
5
Investigation of the Tm2Se3–Cu2Se–PbSe and Lu2Se3–Cu2Se–PbSe Systems at 870 K
Gulay L., Wołcyrz M., Pietraszko A., Olekseyuk I.
Polish Journal of Chemistry
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2006
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Vol. 80, nr 10
1703-1714
EN
Phase equilibria in Tm2Se3–Cu2Se–PbSe and Lu2Se3–Cu2Se–PbSe systems at 870 K were investigated, using X-ray powder diffraction. R(2+x)/3Cu2-xSe2 (0 x 1) solid solutions (space group P3) were found in R2Se3–Cu2Se (R = Tmand Lu) sections of both systems. Crystal structure determinations for terminal RCuSe2 compositions of these solid solutions were performed. Er2/3Cu2S2 structure type was confirmed for TmCuSe2. LuCuSe2 crystallizes in the same structure, but with one extra position for Lu atoms. Crystal structures of R2PbSe4 (space group Pnma) in R2Se3–PbSe sections were determined usingX-single crystal and powder diffraction forR =Tmand Lu, respectively. The existence of R3.33CuPb1.5Se7 (Lu3.33CuPb1.5Se7 structure type, space group Cm), RCuPbSe3 (-BaLaCuSe3 structure type, space group Pnma) and Tm5CuPb3Se11 (Er5CuPb3Se11 structure type, space group Cmcm) compounds in R2Se3–Cu2Se-PbSe (R = Tm and Lu) systems was confirmed.
6
Investigation of the Tb2Se3-Cu2Se-PbSe and Dy2Se3-Cu2Se-PbSe Systems at 870 K
Gulay L., Wolcyrz M., Olekseyuk I.
Polish Journal of Chemistry
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2006
|
Vol. 80, nr 5
805-815
EN
Isothermal sections of the Tb2Se3-Cu2Se-PbSe and Dy2Se3-Cu2Se-PbSe systems at 870 K were explored using X-ray powder diffraction. TbCuSe2 compound (LaCuS2 structure type, space group P21/c) and Tb(2+x)/3Cu2-xSe2 (0 _ x _ 0.85) solid solution (Er2/3Cu2S2 structure type, space group P3) were identified in the Tb2Se3-Cu2Se section and their crystal structures were determined. The existence of Dy(2+x)/3Cu2-xSe2 (0 _ x _1) solid solution (Er2/3Cu2S2 structure type, space group P3) was confirmed in the Dy2Se3-Cu2Se section and its structure was refined. Tb2+2xPb1-3xSe4 (0.07 _ x _ 0.19) solid solution (Th3P4 structure type, space group I43d) was identified and Dy6Pb2Se11 compound (Y6Pb2Se11 structure type, space group Cmcm) was observed in the R2Se3-PbSe section of the system with R = Tb or Dy, respectively. Crystal structure of Tb2+2xPb1-3xSe4 was refined. The existence of Tb3.33CuPb1.5Se7 (Lu3.33CuPb1.5Se7 structure type, space group Cm) and TbCuPbSe3 (beta-BaLaCuSe3 structure type, space groupPnma) compounds in the Tb2Se3-Cu2Se-PbSe system as well as of the isostructural Dy3.33CuPb1.5Se7 and DyCuPbSe3 compounds in the Dy2Se3-Cu2Se-PbSe system was confirmed
7
Phase Equilibria in the AgGaS2-GeS2 Systems
Olekseyuk I., Gorgut G. P., Shevtchuk M. V.
Polish Journal of Chemistry
|
2002
|
Vol. 76 / nr 7
915-919
EN
The AgGaS2-GeS2 section has been investigated using the methods of physico-chemical analyses. The existence of _-tetragonal, _-monoclinic solid solutions on the basis of the initial compounds and the intermediate _-phase, which crystallizes in Fdd2 space group, has been established. The _-phase forms the eutectics with the initial components. Their coordinates are: 42 mol.% GeS2 (1121 K) and 93 mol.% GeS2 (1095 K).
8
The Polythermal CuGaSe2-Cu8GeSe6 Section of the Quasiternary Cu2Se-Ga2Se3-GeSe2 System
Olekseyuk I.
Polish Journal of Chemistry
|
2001
|
Vol. 75, nr 10
1413-1416
EN
The polythermal CuGaSe2-Cu8GeSe6 section has been constructed using differential thermal, X-ray and microstructural analyses. It has been established that this section is a quasibinary one only in the subsolidus part. The ranges of the solid solutions have been determined.
9
The phase equilibria on AgGaS2/AgInS2/-HgS section in the quasi-ternary Ag2S-HgS-Ga2S3/In2S3/ systems
Olekseyuk I., Galka V., Parasyuk O.
Polish Journal of Chemistry
|
1999
|
vol. 73 nr 2
255-261
EN
The phase diagrams of AgGaS2/AgInS2/-HgS sections in the quasi-ternary Ag2S-HgS-Ga2S3/In2S3/ systems have been constructed using differential thermal, X-ray phase and microstructural analyses. AgGaS2-HgS section is quasi-binary and belongs to the eutectic type. The coordinates of the eutectic point are 76 mol% HgS and 1018 K. AgInS2-HgS is not quasi-binary above the solidus. In the AgInS2-HgS system the limited solid solutions within the composition range 0-2 mol% HgS and 82-98 mol% HgS at 670 K were discovered. The compounds AgInS2 and HgS form limited solid solutions within the composition range 0-2 mol% HgS and 71-95 mol% HgS at 670 K. The solid solutions, in the part HgS-rich, are created on the basis of the low temperature cubic structure (a-HgS) on both sections.
10
Phase relations in the CuGaTe2-HgTe and CuInTe2-HgTe systems
Parasyuk O., Olekseyuk I., Morenko A., Gorgut G.
Polish Journal of Chemistry
|
1999
|
vol. 73 nr 5
765-771
EN
Phase equilibria in the CuGaTe2-HgTe and CuInTe2-HgTe systems are investigated by differential thermal, X-ray phase and microstructural analyses. Both systems are of quasibinary, peritectic type, resulting in the formation of solid solutions. Solid solubility in HgTe varies from 0-31 mol% for Cu GaTe2 and from 0-64 mol% for CuInTe2. The solid solution based on CuInTe2 does not exceed 4mol% HgTe and the one based on CuGaTe2 contains less than 2 mol% HgTe.
11
Phase Equilibria in the Ag2Se-In2Se3-GeSe2(SnSe2) system
Olekseyuk I., Krykhovets O., Sysa L.
Polish Journal of Chemistry
|
1999
|
vol. 73 nr 3
431-436
EN
Phase Equilibria in the Ag2Se-In2Se3-GeSe2(SnSe2) and Ag2Se-In2Se3-GeSe2 systems have been established using X-ray and microstructural analysis. Homogeneity region of the AgInSe2 compound and lattice parameters of solid solutions in both systems have been determined. Four new compounds have been found. X-ray single crystal study has been performed for Ag2In2GeSe6; space group CC, a= 1.2692(3), b= 0.7492(1), c= 1.2644(3) nm, b= 109.50(3)0.
12
Interaction in the AgInSe2-Ag8GeSe6(Ag8SnSe6) systems
Olekseyuk I., Krykhovets O.
Polish Journal of Chemistry
|
1999
|
vol. 73 nr 2
287-291
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