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<p>The interaction of the components in the ternary systems (Gd, Er)–Re–Ge was investigated using X‑ray diffraction, phase and structural analysis, and partial microstructural analysis. The isothermal sections of the phase diagram of the system at 1070 K were constructed. A&#xa0;ternary germanide is formed in both systems with a&#xa0;constant composition at the investigated temperature. Appreciable solubility of the third component in the compounds of binary systems was not observed. The realization of the CeNiSi<sub>2</sub> crystal structure type was studied in the ternary R–Re–Ge system. The structural parameters of ternary germanides were determined: YRe<sub>0.29(2)</sub>Ge<sub>2</sub> (crystal structure type CeNiSi<sub>2</sub>, Pearson symbol <i>oS</i>16, space group <i>Cmcm, a</i> = 4.1334(4), <i>b</i> = 15.8984(15), <i>c</i> = 4.0342(4) Å, <i>R</i><sub>P</sub> = 0.0293, <i>R</i><sub>B</sub> = 0.0733, χ<sup>2</sup> = 1.05); LuRe<sub>0.20(2)</sub>Ge<sub>2</sub> (crystal structure type CeNiSi<sub>2</sub>, Pearson symbol <i>oS</i>16, space group <i>Cmcm, a</i> = 4.0904(7), <i>b</i> = 15.650(2), <i>c</i> = 3.9855(6) Å, <i>R</i><sub>P</sub> = 0.0470, <i>R</i><sub>B</sub> = 0.0700, χ<sup>2</sup> = 1.74). The peculiarities of components interaction in R–Re–Ge systems, the specific features of the structures of the found ternary germanides of rhenium and rare-earth metals, and the peculiarities of their implementation in these systems were studied. The relationships between the compound structures in ZrSi<sub>2</sub>, SmNiGe<sub>3</sub>, and ErGe<sub>2.16</sub>, as well as their structural types, were analyzed based on the nearest coordination environment of the least electronegative atoms.</p>

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Interaction of component and crystal structure of compounds in (Gd, Er)–Re–Ge and related systems at 1070 K

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • V. M. Mykhalichko,
  • L. O. Fedyna,
  • A. O. Fedorchuk,
  • M. F. Fedyna

摘要

The interaction of the components in the ternary systems (Gd, Er)–Re–Ge was investigated using X‑ray diffraction, phase and structural analysis, and partial microstructural analysis. The isothermal sections of the phase diagram of the system at 1070 K were constructed. A ternary germanide is formed in both systems with a constant composition at the investigated temperature. Appreciable solubility of the third component in the compounds of binary systems was not observed. The realization of the CeNiSi2 crystal structure type was studied in the ternary R–Re–Ge system. The structural parameters of ternary germanides were determined: YRe0.29(2)Ge2 (crystal structure type CeNiSi2, Pearson symbol oS16, space group Cmcm, a = 4.1334(4), b = 15.8984(15), c = 4.0342(4) Å, RP = 0.0293, RB = 0.0733, χ2 = 1.05); LuRe0.20(2)Ge2 (crystal structure type CeNiSi2, Pearson symbol oS16, space group Cmcm, a = 4.0904(7), b = 15.650(2), c = 3.9855(6) Å, RP = 0.0470, RB = 0.0700, χ2 = 1.74). The peculiarities of components interaction in R–Re–Ge systems, the specific features of the structures of the found ternary germanides of rhenium and rare-earth metals, and the peculiarities of their implementation in these systems were studied. The relationships between the compound structures in ZrSi2, SmNiGe3, and ErGe2.16, as well as their structural types, were analyzed based on the nearest coordination environment of the least electronegative atoms.