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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Molten gallium as a non-reactive solvent: Synthesis of the silicides RE2Ni3+xSi5-x (RE = Sm, Gd and Tb)
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Molten gallium as a non-reactive solvent: Synthesis of the silicides RE2Ni3+xSi5-x (RE = Sm, Gd and Tb)

机译：熔融镓作为非反应性溶剂：硅化物RE2Ni3 + xSi5-x的合成（RE = Sm，Gd和Tb）

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摘要

The use of molten Ga as a non-reactive solvent for the synthesis of intermetallic silicides was demonstrated on the family RE2Ni3+xSi5-x (RE = Sm, Gd and Tb). The structure of Sm2Ni3+xSi5-x was solved from single crystal X-ray data in the orthorhombic space group Ibam, Z = 4, cell parameters a = 9.6396(12); b = 11.3219(14); and c = 5.6967(13) Angstrom. The refinement based on the full-matrix least-squares on F-o(2) [I > 2sigma(I)] converged to final residuals R-1/wR(2) = 0.0206/0.0492. The structure of RE2Ni3+xSi5-x is related to the U2Co3Si5 structure type; however, discrepancies exist between the solution obtained for RE2Ni3+xSi5-x and that reported for U2Co3Si5. The magnetic properties studied on Tb2Ni3+xSi5-x, indicate an antiferromagnetic ordering of magnetic moments centered at Tb ions at 13 K, and Curie-Weiss behavior at high temperatures with the effective moment close to that of free Tb3+ ion. [References: 42]
机译：在RE2Ni3 + xSi5-x族（RE = Sm，Gd和Tb）上证明了使用熔融Ga作为非反应性溶剂合成金属间硅化物的方法。 Sm2Ni3 + xSi5-x的结构由正交晶体空间群Ibam中的单晶X射线数据解析，Z = 4，单元参数a = 9.6396（12）; b = 11.3219（14）; c ＝ 5.6967（13）埃。基于F-o（2）[I> 2sigma（I）]的全矩阵最小二乘法的精化收敛到最终残差R-1 / wR（2）= 0.0206 / 0.0492。 RE2Ni3 + xSi5-x的结构与U2Co3Si5结构类型有关。但是，对于RE2Ni3 + xSi5-x获得的溶液与针对U2Co3Si5报道的溶液之间存在差异。在Tb2Ni3 + xSi5-x上研究的磁性能表明，磁矩以13 K为中心的Tb离子具有反铁磁有序性，并且在高温下的居里-魏斯行为与有效Tb3 +离子接近。 [参考：42]

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