Архів / Том LIII 2018

Volodymyr LEVYTSKYY, Volodymyr BABIZHETSKYY, Pavlo DEMCHENKO, Bogdan KOTUR

Ivan Franko National University of Lviv, Kyryla and Mefodiya Str., 6, UA-79005 Lviv, Ukraine

DOI: https://doi.org/10.37827/ntsh.chem.2018.53.007

SYSTEM Tb–Ni–C AT 800 °C. CRYSTAL AND ELECTRONIC STRUCTURE OF TbNiC₂ SINGLE CRYSTAL

Phase equilibria at 800 °C in the concentration part up to 33.3 at. % Tb of the Tb–Ni–C system were determined. Three ternary compounds Tb₁₁Ni₆₀C₆, Tb₂Ni₅C₃ and TbNiC₂ have been found to occur at thermodynamically equilibrium conditions. Crystal structure of TbNiC₂ was refined by means of a single crystal X-ray diffraction method: structure type CeNiC₂, space group Amm2, a = 3.6010(7) Å, b = 4.5110(9) Å, c = 6.046(1) Å, R₁ = 2.2 %, wR₂ = 5.2 %. Real-space chemical bonding analysis indicates the TbNiC₂ compound represents a unique series of ternary carbide structures stabilized by complex interaction of different types of chemical bonding.

Key words: phase equilibria, single crystal, crystal structure, chemical bonding.

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How to Cite

Levytskyy V., Babizhetskyy V., Demchenko P., Kotur B. SYSTEM Tb–Ni–C AT 800 °C. CRYSTAL AND ELECTRONIC STRUCTURE OF TbNiC₂ SINGLE CRYSTAL Proc. Shevchenko Sci. Soc. Chem. Sci. 2018 Vol. LIII. P. 7-15.