Crystal structure and magnetic properties of Ce7Ni5 ± xGe3 ± xIn6 and Pr7Ni5 ± Ge3 ± xIn6

被引：9

作者：

Chumalo, Nataliya ^{[1
,2
]}

Nychyporuk, Galyna P. ^{[2
]}

Pavlyuk, Volodymyr V. ^{[2
]}

Poettgen, Rainer ^{[1
]}

Kaczorowski, Dariusz ^{[3
]}

Zaremba, Vasyl' I. ^{[2
]}

机构：

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

[2] Ivan Franko Natl Univ Lviv, Dept Inorgan Chem, UA-79005 Lvov, Ukraine

[3] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 12期

关键词：

Intermetallic compounds; Crystal chemistry; Magnetic properties; NEUTRON-DIFFRACTION; PHYSICAL-PROPERTIES; X-RAY; RARE; NICKEL; METAL; NI; CE; CU; ND;

D O I：

10.1016/j.jssc.2010.10.005

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The indides Ce7Ni5 +/- Ge-x(3) (+/-) In-x(6) and Pr7Ni5 Ge-+/- x(3) (+/-) In-x(6) were synthesized from the elements by arcmelting of the components. Single crystals were grown via special annealing sequences. Both structures were solved from X-ray single crystal diffraction data: new structure type, P6/m. Z=1, a=11.385(2). c=4.212(1) angstrom, wR(2)=0.0640, 634F(2) values, 25 variables for Ce7Ni4.73Ge3.27In6 and a=11.355(6), c=4.183(2) angstrom, wR(2)=0.0539. 563F(2) values, 25 variables for Pr7Ni4.73Ge3.27In6. Both indides show homogeneity ranges through Ni/Ge mixing (M sites). This new structure type can be derived from the AlB2 structure type by a substitution of the Al and B atoms by CeM12 and NiIn6Ce3 polyhedra (tricapped trigonal prism). Magnetic susceptibility measurements on a polycrystalline sample of Ce7Ni5Ge3In6 indicated Curie-Weiss like paramagnetic behavior down to 1.71 K with the effective magnetic moment slightly reduced in relation to the value expected for trivalent cerium ions. No magnetic ordering is evident. (c) 2010 Elsevier Inc. All rights reserved.

引用

页码：2963 / 2967

页数：5

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