Structure and chemical bonding of Ce2Ge2In and Ce2Pt2In

被引：14

作者：

Zaremba, VI

Johrendt, D

Rodewald, UC

Nychyporuk, GP

Pöttgen, R

机构：

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

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

[3] Univ Munich, Dept Chem & Biochem, D-81377 Munich, Germany

来源：

SOLID STATE SCIENCES | 2005年 / 7卷 / 08期

关键词：

indium; germanides; crystal structure; chemical bonding;

D O I：

10.1016/j.solidstatesciences.2005.04.012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Ce2Ge2In was synthesized by are-melting the elements under argon. Its Mo2FeB2 type structure was refined on the basis of the single crystal data: P4/mbm, a = 756.3(1), c = 438.1(1) pm, omega R2 = 0.0456, 339 F-2 values and 12 variable parameters. The structure is an intergrowth of distorted AlB2 and CsCl related slabs of compositions CeGe2 and CeIn with a Ge-Ge distance of 253 pm within the AlB2 slabs. The COHP analysis confirms strong covalent Ge-Ge bonds, which determines the structure more than the corresponding Pt-Pt bonds in isostructural Ce2Pt2In. The weaker Pt-Pt bonding energy is compensated by stronger Ce-Pt interactions, which results in almost identical total ICOHP bonding energies for Ce2Pt2In and Ce2Ge2In. (c) 2005 Elsevier SAS. All rights reserved.

引用

页码：998 / 1002

页数：5

共 48 条

[1]

ANDERSEN OK, 1994, TIGHT BINDING LMTO V

[2] Crystal structure and magnetism of Gd2MgGe2 [J].