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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >New transition metal-rich rare-earth palladium/platinum aluminides with RET5Al2 composition: structure, magnetism and Al-27 NMR spectroscopy
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New transition metal-rich rare-earth palladium/platinum aluminides with RET5Al2 composition: structure, magnetism and Al-27 NMR spectroscopy

机译：具有RET5Al2组成的新型富含过渡金属的稀土钯/铝铂化合物：结构，磁性和Al-27 NMR光谱

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摘要

REPd5Al2 compounds with RE = Ce-Gd as well as Y and Lu have been previously synthesized. Although some compounds with the small lanthanides also exist, the compounds with intermediate-sized rare-earth elements (RE = Tb-Yb) had not been prepared. We report on the missing members of the REPd5Al2 (RE = Tb-Yb) series as well as on the new REPt5Al2 (RE = Y, Gd-Tm, Lu) series, which we have synthesized and structurally as well as magnetically characterized. All members crystallize isostructurally in the ZrNi2Al5 type with an anti-arrangement of the T = Pd/Pt and Al atoms. YPd5Al2 and LuPd5Al2, as well as the respective platinum homologs, YPt5Al2 and LuPt5Al2, have been characterized also by Al-27 magic-angle spinning nuclear magnetic resonance spectroscopy. Consistent with the XRD analysis, the spectra indicate the existence of only one distinct Al site in the structure.
机译：先前已合成了RE = Ce-Gd以及Y和Lu的REPd5Al2化合物。尽管也存在一些带有少量镧系元素的化合物，但尚未制备具有中等尺寸稀土元素（RE = Tb-Yb）的化合物。我们报告了REPd5Al2（RE = Tb-Yb）系列的缺失成员以及新的REPt5Al2（RE = Y，Gd-Tm，Lu）系列的缺失成员，我们对其进行了合成，结构以及磁学表征。所有成员均以ZrNi2Al5型同构结晶，且T = Pd / Pt和Al原子呈反排列。 YPd5Al2和LuPd5Al2以及各自的铂同系物YPt5A​​l2和LuPt5Al2，也已通过Al-27幻角旋转核磁共振波谱进行了表征。与XRD分析一致，光谱表明结构中仅存在一个不同的Al位点。

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