Crystal structures, Raman spectroscopy, and magnetic properties of Ba7.5Al13Si29 and Eu0.27Ba7.22Al13Si29

被引：24

作者：

Condron, CL ^{[1
]}

Porter, R ^{[1
]}

Guo, T ^{[1
]}

Kauzlarich, SM ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA

来源：

INORGANIC CHEMISTRY | 2005年 / 44卷 / 25期

关键词：

D O I：

10.1021/ic050483d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The framework-deficient clathrate phases Ba7.5Al13Si29 and Eu0.27Ba7.22Al13Si29 were prepared using a molten Al flux. Single-crystal X-ray diffraction confirmed the two phases to be clathrate type I (space group Pm (3) over barn). For Eu0.27Ba7.22Al13Si29, single-crystal X-ray diffraction revealed the Eu to partially occupy the 2a position. Microprobe analysis of single crystals provided the stoichiometry, and Raman spectroscopy was used to investigate the guest framework interactions. The Raman spectra are consistent with both Ba7.5Al13Si29 and Eu0.27Ba7.22Al13Si29 having minimal guest-host interactions. Magnetic susceptibility data for Eu0.27Ba7.22Al13Si29 imply weak magnetic ordering and indicate a 2+ oxidation state for the Eu ion.

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页码：9185 / 9191

页数：7

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