V. Levytskyy, V. Babizhetskyy, P. Demchenko, B. Kotur
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引用次数: 1
摘要
浓度部分在800℃达到33.3℃时达到相平衡。测定了Tb - ni - c体系的% Tb。在热力学平衡条件下发现了三种三元化合物Tb 11ni60c6、Tb 2ni5c3和TbNiC 2。采用单晶x射线衍射法对TbNiC 2的晶体结构进行了精细分析:结构类型为CeNiC 2，空间群为Amm2, a = 3.6010(7) Å， b = 4.5110(9) Å， c = 6.046(1) Å， r1 = 2.2%， wr2 = 5.2%。实际空间化学键分析表明，TbNiC - 2化合物是一系列独特的三元碳化物结构，通过不同类型化学键的复杂相互作用稳定了其结构。
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 Tb 11 Ni 60 C 6 , Tb 2 Ni 5 C 3 and TbNiC 2 have been found to occur at thermodynamically equilibrium conditions. Crystal structure of TbNiC 2 was refined by means of a single crystal X-ray diffraction method: structure type CeNiC 2 , space group Amm2, a = 3.6010(7) Å, b = 4.5110(9) Å, c = 6.046(1) Å, R 1 = 2.2 %, wR 2 = 5.2 %. Real-space chemical bonding analysis indicates the TbNiC 2 compound represents a unique series of ternary carbide structures stabilized by complex interaction of different types of chemical bonding.
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