Evolution of the germanium-oxygen coordination number in lithium-lead-germanate glasses
文献类型：期刊论文
| 作者 | Rada, M; Aldea, N; Wu ZH(吴忠华) ; Zhang J(张静); Wu, ZH; Jing, Z; Rada, S; Culea, E; Macavei, S; Balan, R
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| 刊名 | JOURNAL OF NON-CRYSTALLINE SOLIDS
 |
| 出版日期 | 2016 |
| 卷号 | 437页码:10-16 |
| 关键词 | Lithium-lead-germanate glasses Raman spectroscopy X-ray scattering analysis |
| DOI | 10.1016/j.jnoncrysol.2016.01.015 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Lithium-lead-germanate glasses in the xLi(2)O center dot(100-x)[7GeO(2)center dot 3PbO] system, where 0 <= x <= 40 mol% Li2CO3 exhibit a "germanate anomaly", which is a maximum in their density profiles with the addition of Li2CO3 up to 20 mol%. The structural characterization of the samples was performed by investigations of Raman spectroscopy and X-ray scattering analysis. An EXAFS analysis of the spectra collected at the germanium K-edge for series of lithium-lead-germanate glasses is also presented. With the EXAFS-extracted structural parameters were reconstructed to the local neighborhood of Ge atoms and were verified current opinions on the germanate anomaly in the considered glasses. The formation of higher-coordinated Ge species in the glassy network can be correlated with the density anomaly. Several structural mechanisms can be summarized by increasing of lithium carbonate in the lead-germanate glassy: i) depolymerization of germanate network; ii) conversion of 3- to 4-membered [GeO4] rings; iii) transformation of connected [GeO6] structural units into isolated [GeO6] structural units and a conversion part of higher to lower coordination number of germanium atoms. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS关键词 | RAY-ABSORPTION SPECTROSCOPY ; PBO-GEO2 GLASSES ; EXAFS ; SCATTERING ; NEUTRON ; PROGRAM ; OXIDE ; RAMAN ; XAS |
| 语种 | 英语 |
| WOS记录号 | WOS:000372680800003 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/260276]  |
| 专题 | 中国科学院高能物理研究所 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Rada, M,Aldea, N,Wu ZH,et al. Evolution of the germanium-oxygen coordination number in lithium-lead-germanate glasses[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2016,437:10-16. |
| APA | Rada, M.,Aldea, N.,吴忠华.,张静.,Wu, ZH.,...&Bodnarchuk, V.(2016).Evolution of the germanium-oxygen coordination number in lithium-lead-germanate glasses.JOURNAL OF NON-CRYSTALLINE SOLIDS,437,10-16. |
| MLA | Rada, M,et al."Evolution of the germanium-oxygen coordination number in lithium-lead-germanate glasses".JOURNAL OF NON-CRYSTALLINE SOLIDS 437(2016):10-16. |
入库方式： OAI收割
来源：高能物理研究所
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