The structure of B-type Sm2O3. A powder neutron diffraction study using enriched 154Sm

被引：14

作者：

Kennedy, Brendan J. ^{[1
]}

Avdeev, Max ^{[2
]}

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Australian Nucl Sci & Technol Org, Bragg Inst, Menai, NSW 2234, Australia

来源：

SOLID STATE SCIENCES | 2011年 / 13卷 / 09期

基金：

澳大利亚研究理事会;

关键词：

Neutron diffraction; Sm2O3; Sm-154; Isotope; TRANSITION; SAMARIUM;

D O I：

10.1016/j.solidstatesciences.2011.06.020

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The structure of Sm2O3 in its B-type monoclinic (C2/m) form has been refined through Rietveld refinement of powder neutron diffraction data. In order to overcome the high absorption cross-section of naturally occurring Sm the Sm-154 was used. The refined structure shows the average coordination of each of the three crystallographically unique Sm sites to be comparable. An un-expected result of this work is the relatively large difference between the refined (8.62 (1) fm) and tabulated (9.30 fm) scattering lengths of Sm-154. Evidently small variations in the precise isotopic composition can significantly alter this value. (C) 2011 Elsevier Masson SAS. All rights reserved.

引用

页码：1701 / 1703

页数：3

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