New transition metal-rich rare-earth palladium/platinum aluminides with RET5Al2 composition: structure, magnetism and 27Al NMR spectroscopy

被引：22

作者：

Benndorf, Christopher ^{[1
,2
]}

Stegemann, Frank ^{[1
]}

Eckert, Hellmut ^{[2
,3
]}

Janka, Oliver ^{[1
]}

机构：

[1] Univ Munster, Inst Anorgan & Analyt Chem, D-48149 Munster, Germany

[2] Univ Munster, Inst Phys Chem, D-48149 Munster, Germany

[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2015年 / 70卷 / 02期

关键词：

aluminum; intermetallics; magnetic properties; palladium; platinum; solid state NMR; X-RAY; ALLOYS; TRIALUMINIDE; PHASES; AL;

D O I：

10.1515/znb-2014-0223

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

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.

引用

页码：101 / 110

页数：10

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