• phase diagrams of multicomponent metal systems
• crystal structure of intermetallic compounds
• magnetic, electrical and electrochemical properties of intermetallics

Articles:

1. V. Pavlyuk, V. Kordan, O. Zelinska, N. Pavlyuk, G. Dmytriv, B.H. Silva, A. Kumar, S. Sartori, B.C. Hauback, A.O. Sjåstad, Hydrogenation properties of composite materials based on yttrium substituted Mg₁₇Al₁₂, J. Alloys Compd. 1057 (2026) 186660.
2. I. Kalytovsyi, O. Zelinska, V. Kordan, A. Zelinskyi, G. Dmytriv, V. Pavlyuk, Synthesis, Phase Analysis and Electrochemical Hydrogenation of an alloy on the basis of laNi₅ dopped with Zr, Mg and Sn, Visn. Lviv. Univ., Ser. Chem. 66 (2025) 94-101.
3. N. Pavlyuk, V. Kordan, G. Dmytriv, O. Zelinska, B. Rożdżyńska-Kiełbik, W. Ciesielski, V. Pavlyuk, Gas and electrochemical hydrogenation of Mg₂Sn_0.6Ni_0.4 and Mg₂Sn_0.6Sb_0.4 alloys, J. Energy Storage 98 (2024) 113112.
4. V. Kordan, V. Nytka, V. Voloshyn, O. Zelinska, I. Tarasiuk, V. Pavlyuk, Synthesis, phase composition and electrochemical hydrogenation of the alloys Tb2Ni7:Mg and Tb2Ni7:Li,Mg,Sb, Visn. Lviv Univ., Ser. Chem. 65 (2024) 122-133. (in Ukrainian)
5. V. Kordan, I. Tarasiuk, O. Zelinska, V. Pavlyuk, Synthesis and properties of Li_x+yTi₂Sn_3-y and Li_yTi₂Sn_1-y solid solutions, Visn. Lviv Univ., Ser. Chem. 63 (2022) 117-124. (in Ukrainian)
6. V. Nytka, V. Kordan, I. Tarasiuk, O. Zelinska, V. Pavlyuk, Polymorphism of the Tb₂Ni₇ binary compound. Solubility of lithium and magnesium in α-phase, Visn. Lviv Univ., Ser. Chem. 63 (2022) 74-81. (in Ukrainian)
7. N.O. Chorna, V.M. Kordan, A.M. Mykhailevych, O.Ya. Zelinska, A.V. Zelinskiy, K. Kluziak, R.Ya. Serkiz, V.V. Pavlyuk, Electrochemical hydrogenation, lithiation and sodiation of the GdFe_2-xM_x and GdMn_2-xM_x intermetallics, Iss. Chem. Chem. Technol. 2(2021) 139-149.
8. V. Kordan, V. Nytka, I. Tarasiuk, O. Zelinska, V. Pavlyuk, Synthesis, crystal structure, and electrochemical hydrogenation of the La₂Mg_17-xM_x (M = Ni, Sn, Sb) solid solutions, Eur. J. Chem. 12(2) (2021) 197–203.
9. N. Chorna, V. Kordan, V. Nytka, О. Zelinska, I. Tarasiuk, A. Zelinskiy, V. Pavlyuk, Electrochemical hydrogenation of the R₂Zn_17-xMn_x phases (R = Y, La, Gd, Tb), Chem. Met. Alloys. 13 (3/4) (2020) 78–84.
10. V.V. Shtender, V.V. Pavlyuk, O.Ya. Zelinska, W. Nitek, V. Paul-Boncour, G.S. Dmytriv, W. Łasocha, I.Yu. Zavaliy, The Y–Mg–Co ternary system: alloys synthesis, phase diagram at 500 ^оC and crystal structure of the new compounds, J. Alloys Compd. 812 (2020) 152072.
11. V. Kordan, V. Nytka, I. Tarasiuk, O. Zelinska, R. Serkiz, V. Pavlyuk, Continious series of solid solutions Tb₂Ni_17-xCo_x, 0 ≤ x ≤ 17. Structural and electrochemical characteristics of alloys, Visn. Lviv Univ., Ser. Chem. 61(1) (2020) 80-92. (in Ukrainian)
12. V. Kordan, O. Zelinska, I. Tarasiuk, A. Zelinskiy, R. Serkiz, V. Pavlyuk, Isothermal section of the Mg–Ti–Sn phase diagram at 400 ºС, Visn. Lviv. Univ., Ser. Chem. 61(1) (2020) 22-35. (in Ukrainian)
13. V. Kordan, O. Zhyshkovych, O. Zelinska, V. Pavlyuk, R. Serkiz, Pecularities of electrochemical lithiation of the binary intermetallics of the systems {Ti, V}–Al, Visn. Lviv Univ., Ser. Chem. 60(1) (2019) 127-139. (in Ukrainian)
14. N. Chorna, N. Sagan, O. Zelinska, V. Kordan, A. Zelinskiy, V. Pavlyuk, Phase equilibria in the ternary system Gd–Fe–Zn and electrochemical hydrogenation of the phases, Chem. Met. Alloys 11(1/2) (2018) 27-33.
15. N. Chorna, V. Andrash, O. Zelinska, V. Kordan, A. Zelinskiy, V. Pavlyuk, Crystal structure and electrochemical hydrogenation of LaZn_5-xMn_x solid solution, Visn. Lviv Univ., Ser. Chem. 59(1) (2018) 107-114. (in Ukrainian)
16. V. Kordan, O. Zelinska, I. Tarasiuk, R. Serkiz, V. Pavlyuk, LaSn₃-based solid solutions as new electrode materials for Li-ion batteries, Visn. Lviv Univ., Ser. Chem. 59(1) (2018) 115-122. (in Ukrainian)
17. V.V. Shtender, V.V. Pavlyuk, R.V. Denys, J.-C. Crivello, O.Ya. Zelinska, B. Marciniak, I.Yu. Zavaliy, Y₆Mg₉Co₂ and Y₉Mg₃₀Co₂: Novel magnesium-rich compounds representing new structure types, J. Alloys Compd. 737 (2018) 613-622.
18. V. Kordan, O. Zelinska, V. Pavlyuk, Reactions of combination, decomposition and substitution during electrochemical intercalation of lithium into the structures of Tb₅Sn₃ and Tb₅Sb₃ compounds, Visn. Lviv Univ., Ser. Chem. 58(1) (2017) 108-116. (in Ukrainian)
19. V. Kordan, V. Nytka, G. Kovalczyk, A. Balinska, O. Zelinska, R. Serkiz, V. Pavlyuk, Influence of doping elements on the efficiency of electrochemical hydrogenation of the phases with the Th₂Ni₁₇-type structure, Chem. Met. Alloys 10(2) (2017) 61-68.
20. Z.M. Shpyrka, O.Ya. Zelinska, V.V. Pavlyuk, Formation of professional competencies of biology students while solving chemical problems, Coll. Scient. Works II All-Ukr. Scient. Pract. Int. Conf. “Current issues of training future chemistry teachers: theory and practice”, Vinnytsia 3 (2017) 95-98.
21. V.V. Shtender, O.Ya. Zelinska, V.V. Pavlyuk, R.V. Denys, V. Paul-Boncour, I.Yu. Zavaliy, B. Marciniak, E. Różycka-Sokołowska, Phase equilibria in the Nd–Mg–Co system at 300 and 500 °C, crystal structure and hydrogenation behavior of selected compounds, Intermetallics 87 (2017) 61-69.
22. V. Kordan, O. Zelinska, V. Pavlyuk, V. Nytka, R. Serkiz, Electrochemical hydrogenation of Tb₂Ni_17-xM_x (M = Mg, Sn) phases, Сhem. Met. Alloys 9(3/4) (2016) 153-157.
23. V. Kordan, O. Zelinska, V. Pavlyuk, I. Oshchapovsky, R. Serkiz, Electrochemical lithiation of Ti₅M₃, Ti₃M and Zr₃M (M = Sn, Sb) binary intermetallics, Chem. Met. Alloys 9(1/2) (2016) 84-91.
24. V. Kordan, V. Pavlyuk, O. Zelinska, Electrochemical lithiation of magnesium and tin, Visn. Lviv Univ., Ser. Chem. 57(1) (2016) 148-154. (in Ukrainian)
25. V.V. Shtender, R.V. Denys, I.Yu. Zavaliy, O.Ya. Zelinska, V. Paul-Boncour, V.V. Pavlyuk, Phase equilibria in the Tb–Mg–Co system at 500 °C, crystal structure and hydrogenation properties of selected compounds, J. Solid State Chem. 232 (2015) 228-235.
26. N. Dychko, O. Zelinska, A. Zelinskiy, V. Pavlyuk, Isothermal section of the La–Fe–Zn at 670 K, Visn. Lviv Univ., Ser. Chem. 56(1) (2015) 46-52. (in Ukrainian)
27. O.Ya. Zelinska, Z.M. Shpyrka, Formation of the readiness of the future teacher of chemistry for innovative professional activities, Coll. Scient. Art. Int. Scient.-Method. Conf. “Methods of teaching chemical and ecological disciplines”, Brest, Belarus (2015) 48-51.
28. A. Stetskiv, V. Kordan, I. Tarasiuk, O. Zelinska, V. Pavlyuk, Structural peculiarities and electrochemical properties of R₅M₃ (R = La, Gd; M = Ge, Sn) doped by lithium, Chem. Met. Alloys 7 (2014) 106-111.
29. V.M. Kordan, Yu.A. Bobrovska, O.Ya. Zelinska, Creating problem situations while studying inorganic chemistry at school, Mater. Int. Scient.-Pract. Conf. “Methods of teaching natural sciences in secondary and higher school”, Poltava, Ukraine (2014) 123-125. (in Ukrainian)
30. A. Zelinskiy, A. Fedorchuk, O. Zelinska, Synthesis and crystal structure of the compounds UMn_1.43Ga_0.57 and U₂Fe₃Ga, Visn. Lviv Univ., Ser. Chem. 54 (2013) 92-97. (in Ukrainian)
31. A. Zelinskiy, A. Fedorchuk, O. Zelinska, P. Gladyshevskii, Regularities in crystal structures of the compounds in the U–{Fe, Co, Ni}–Ga systems, Proc. Shevchenko Sci. Soc., Chem. Biochem. XXXIII (2013) 96-107. (in Ukrainian)
32. V.M. Kordan, Yu.A. Bobrovska, O.Ya. Zelinska, Application of opportunities of problem-based learning in organic chemistry lessons at school, Coll. Scient. Art. Int. Scient.-Method. Conf. “Methods of teaching chemical and ecological disciplines”, Brest, Belarus (2013) 66-69.
33. Oshchapovsky, O. Zelinska, B. Rozdzynska-Kielbik, V. Pavlyuk, Redetermination of LaZn₅ based on single crystal X-ray diffraction data, Acta Crystallogr. E68(1) (2012) i1.
34. Z. Shpyrka, O. Zelinska, P. Starodub, The ecological component of the professional training of chemistry teachers at a classical university, Coll. Mater. Int. Scient.-Pract. Conf. “Methods of teaching chemical and ecological disciplines”, Brest, Belarus (2012) 267-270.
35. P.K. Starodub, Z.M. Shpyrka, O.Ya. Zelinska, The role of excursions in the ecological education of students during the study of chemistry at school, Coll. Scient. Works Ukr. Scient.-Pract. Conf. “Chemical and ecological education: state and prospects of development”, Vinnytsia (2012) 46-48. (in Ukrainian)
36. O. Zelinska, A. Zelinskiy, V. Pavlyuk, X-ray investigation of the RCo₅–RZn₅ (R = La, Ce, Sm, Gd, Tb) quasibinary systems, Visn. Lviv Univ., Ser. Chem. 52 (2011) 41-47. (in Ukrainian)
37. P.K. Starodub, Z.M. Shpyrka, O.Ya. Zelinska, Pedagogical practice – one of the ways to pedagogical activity of students, Coll. Scient. Works Int. Scient.-Pract. Conf. “Methods of teaching natural sciences in higher and secondary school”. XVIII Karyshyn’s Readings, Poltava (2011) 369-371. (in Ukrainian)
38. O.Ya. Zelinska, A.V. Tkachuk, A.P. Grosvenor, A. Mar, Structure and physical properties of YbZn₂Sb₂ and YbCd₂Sb₂, Chem. Met. Alloys 1(2) (2008) 204-209.
39. O.Ya. Zelinska, A.V. Zelinskiy, V. Pavlyuk,  Isothermal section of the Sm–Co–Zn and Gd–Co–Zn phase diagrams at 470 K,  Chem. Met. Alloys 1(2) (2008) 168-173.
40. Y. Liu, L. Chen, L.-H. Li, L.-M. Wu, O.Ya. Zelinska, A. Mar, Structures and physical properties of rare-earth zinc antimonides Pr₆Zn_1+xSb_14+y and RE₆Zn_1+xSb₁₄ (RE = Sm, Gd-Ho), Inorg. Chem. 47(24) (2008) 11930-11941.
41. V. Pavlyuk, P. Solokha, O. Zelinska, V. Paul-Boncour, A. Nowik-Zając, Ce₂₀Mg₁₉Zn₈₁: a new structure type with a giant cubic cell, Acta Crystallogr. C64 (2008) i50-i52.
42. O.Ya. Zelinska, A. Mar, Ternary rare-earth manganese bismuthides: structures and physical properties of RE₃MnBi₅ (RE = La–Nd) and Sm₂Mn₃Bi₆, Inorg. Chem. 47(1) (2008) 297-305.
43. O.Ya. Zelinska, A. Mar, Structure and electrical resistivity of rare-earth zinc bismuthides REZn_1-xBi₂ (RE = La, Ce, Pr), J. Alloys Compd. 451 (2008) 606-609.
44. H. Bie, O.Ya. Zelinska, A.V. Tkachuk, A. Mar, Structures and Physical Properties of Rare-Earth Chromium Germanides RECrGe₃ (RE = La–Nd, Sm), Chem. Mater. 19 (18) (2007) 4613-4620.
45. H. Bie, D.S.H. Moore, D.G. Piercey, A.V. Tkachuk, O.Ya. Zelinska, A. Mar, Ternary rare-earth titanium antimonides: phase equilibria in the RE–Ti–Sb (RE = La, Er) systems and crystal structures of RE₂Ti₇Sb₁₂ (RE = La, Ce, Pr, Nd) and RETi₃(Sn_xSb_1-x)₄ (RE = Nd, Sm), J. Solid State Chem. 180 (2007) 2216-2224.
46. A. Zelinskiy, A. Fedorchuk, O. Zelinska, H. Noёl, New gallium rich intermetallic compounds in the U–M–Ga systems, Visn. Lviv Univ., Ser. Chem. 48 (2007) 72-77. (in Ukrainian)
47. O.Ya. Zelinska, H. Bie, A. Mar, Structure of Cd_12.7(1)Sb₁₀, Chem. Mater. 19(6) (2007) 1518-1522.
48. O.Ya. Zelinska, A. Mar,  Structure and physical properties of rare-earth zinc antimonides REZn_1-xSb₂ (RE = La, Ce, Pr, Nd, Sm, Gd, Tb),  J. Solid State Chem. 179(12) (2006) 3776-3783.
49. A.V. Tkachuk, O.Ya. Zelinska, A. Mar, Structure and physical properties of nonstoichiometric rare-earth cadmium antimonides, RECd_1-xSb₂ (RE = La, Ce, Pr, Nd, Sm), J. Solid State Chem. 179(5) (2006) 1506-1512.
50. V. Pavlyuk, W. Prochwicz, P. Solokha, O. Zelinska, B. Marciniak, E. Różycka-Sokołowska,  Interaction of the components in the Ce–Cu–Zn ternary system at 200°C. J. Alloys Compd. 407(1-2) (2006) 226-231.
51. O.Ya. Zelinska, P.G. Solokha, V.V. Pavlyuk,  New intermetallic compounds with the ErCuCd₂ type of structure,  J. Alloys Compd. 367(1-2) (2004) 176-179.
52. O. Zelinska, M. Conrad, B. Harbrecht, Refinement of the crystal structure of cerium zinc (1:11), CeZn₁₁, Z. Kristallogr. NCS 219 (2004) 357-358.
53. O. Zelinska, V. Pavlyuk, Yu. Gorelenko, A. Zelinskiy, V. Davydov, Crystal structure and magnetic properties of the SmCo_4.4Zn_0.6 ternary compound, Visn. Lviv Univ., Ser. Chem. 44 (2004) 67-71. (in Ukrainian)
54. V.V. Pavlyuk, B. Marciniak, E. Różycka-Sokolovska, O.Ya. Zelinska, P.G. Solokha, Solubility of zinc in the CeCu₆  intermetallic compound, Intermetallics 12(6) (2004) 665-669.
55. O. Zelinska, P. Solokha, V. Pavlyuk, A. Zelinskiy, New R₃T_1-xZn_x compounds with AuCu₃ structure type, Prace Naukowe WSP w Częstochowie, Chemia 8 (2003) 89-91.
56. O.Ya. Zelinska, V.V. Pavlyuk, A.V. Zelinskiy, V.M. Davydov, Synthesis and crystal structure of the Tb₂Co₂Zn₁₅  intermetallic compound, J. Alloys Compd. 343(1-2) (2002) 132-134.
57. O. Zelinska, V. Pavlyuk, A. Zelinskiy, O. Bodak, Phase equilibria in the system Tb–Co–Zn at 470 K, Visn. Lviv Univ., Ser. Chem. 41 (2002) 36-39. (in Ukrainian)
58. O.Ya. Zelinska, V.V. Pavlyuk, A.V. Zelinskyy, V.M. Davydov, Crystal structure of LaCo_2.17Zn_0.83,  J. Alloys Compd. 333(1-2) (2002) 81-83.
59. O.Ya. Makaryk*, G.S. Dmytriv, D.G. Kevorkov, V.V. Pavlyuk, Comparison of the interaction of components in La–Co–Zn and Ce–Co–Zn ternary systems at 470 K, J. Alloys Compd. 317-318 (2001) 448-449.
60. O.Ya. Makaryk*, V.V. Pavlyuk, G.S. Dmytriv, J.J. Kozioł, W. Ciesielski, J. Kapuśniak, Interaction of the components in the La–Co–Zn ternary system at 470 K, Prace Naukowe WSP w Częstochowie, Chemia 3 (1999) 85-90.

* maiden name of Zelinska

Patents:

Patent for invention No.128885 Ukraine, IPC Н01М4/52, C22C 19/00, C01F 17/00. Electrode material / V.M. Kordan, I.I. Tarasiuk, O.Ya. Zelinska, V.V. Pavlyuk, R.E. Gladyshevskii; applicant and owner Ivan Franko National University of Lviv. – No. a 2023 03246; appl. 06.03.2024, Bull. No. 10.; publ. 13.11.2024, Bull. No. 46.

Patent for invention No.86885 Ukraine, IPC H01M4/02, H01M4/38, C22C1/00, C22C1/02, C22C19/00. Material for accumulators of hydrogenous and metal-hydride chemical sources of energy / V.V. Pavlyuk, O.Ya. Zelinska, G.S. Dmytriv, P.G. Solokha, I.I. Tarasiuk; applicant and owner Ivan Franko National University of Lviv. – No. a 200711910; appl. 29.10.2007; publ. 25.05.09, Bull. No. 10.

State budget projects:

• Head of the state budget project “High-energy electrode materials for dual-purpose chemical sources of electrical energy” (2026-2028),
• Senior researcher of the project “New dual-use materials with efficient electrical properties” (2024-2025),
• Senior researcher of the National Research Foundation of Ukraine project “Metal-hydrides based on modified magnesium alloys for modern high-capacity hydrogen storage systems” (2023-2024),
• “Power Supplies for Dual-Purpose Devices” (2023),
• “Synthesis of new intermetallic compounds and crystal-chemical algorithm for creating highly efficient materials” (2021-2023),
• “New substances, materials, types of matter and approaches to energy saving and environmental protection” (2021),
• “Synthesis and crystal chemistry of new dual-use intermetallic compounds” (2018-2020),
• “The use of blended and distance learning technologies in the study of chemistry in educational institutions” (2018-2023).

International grants:

• “Modern Chemical Research at Lviv University” (Simons Foundation Grant, 2024-2025),
•  Erasmus+ KA171-HED “Teaching Staff Mobility 2023/2024” (April 2024),
•  Erasmus + KA220 HED “Materials Science Ma(s)ters – developing a new master’s degree” (2022-2024),
• “Grant for Chemists of Lviv University” (Simons Foundation Grant, 2022-2023).

1. Z.M. Shpyrka, O.Ya. Zelinska, Program and methodical materials for pedagogical (assistant) practice of master’s degree students of the Faculty of Chemistry. Lviv: IFNUL, 2018. 46 p. (in Ukrainian)
2. B.Ya. Kotur, Z.M. Shpyrka, G.P. Nychyporuk, O.Ya. Zelinska, Physico-chemical analysis of multicomponent systems: laboratory practicum. Lviv: Publishing center of IFNUL, 2013. 105 p. (in Ukrainian)
   
3. Z.M. Shpyrka, O.Ya. Zelinska, Program and methodical materials for pedagogical practice of master’s students of the Faculty of Chemistry. Lviv: Publishing center of IFNUL, 2011. 45 p. (in Ukrainian)
4. O. Zelinska, S. Pukas, N. Liaskovska, O. Romaniv, Yu. Lutsyshyn, A. Zelinskiy, Faculty of Chemistry. Materials for the encyclopedia. Encyclopedia of Lviv University. Ed. R. Gladyshevskii. Lviv: Publishing center of IFNUL, 2003. 136 p. (in Ukrainian)

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