| 硅酸盐玻璃中的Na,Mg K-边XANES谱研究 |
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| 引用本文： | 彭明生,李迪恩.硅酸盐玻璃中的Na,Mg K-边XANES谱研究[J].光谱学与光谱分析,2002,22(5):873-876. |
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| 作者姓名： | 彭明生 李迪恩 |
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| 作者单位： | 中山大学地球科学系,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金 (批准号 49872 0 2 2 ) |
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| 摘 要： | 本文利用同步辐射的NaK 边X 射线近边结构 (XANES)谱研究了含Na玻璃 (Na2 O SiO2 P2 O5和Na2 O SiO2 )的NaK 边的特征 ,同时建立了含磷 (P)的钠玻璃中NaK 边的能量 ,其能量位置随着P的含量增加 ,而增大其能量位置。CaMgSi2 O6(Di) NaAlSi3 O8(Ab)玻璃中MgK 边XANES的能量和Mg—O的键长有关系。在Di Ab玻璃中的Mg—O键距是 2± 0 0 4 。表明本方法可以作为研究含Mg玻璃的配位与局部结构新方法
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| 关 键 词： | 硅酸盐玻璃 XANES谱 钠玻璃 镁玻璃 钠 镁 配位 局部结构 X－射线近边结构 |
| 文章编号： | 1000-0593(2002)05-0873-04 |
| 修稿时间： | 2001年6月9日 |
Na and Mg K-edge XANES Study in Silicate Glasses |
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| PENG Ming-sheng,LI Di-en Institute of Gemstone and Mineral Materials,Zhongshan University,Guangzhou, China.Na and Mg K-edge XANES Study in Silicate Glasses[J].Spectroscopy and Spectral Analysis,2002,22(5):873-876. |
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| Authors: | PENG Ming-sheng LI Di-en Institute of Gemstone and Mineral Materials Zhongshan University Guangzhou China |
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| Institution: | Institute of Gemstone and Mineral Materials, Zhongshan University, Guangzhou, 510275 China. |
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| Abstract: | The structural role of Na in Na2-O-SiO2 and Na2O-SiO2-P2O5 glasses was studied using Na K-edge XANES (X-ray near edge structure) spectra. The Na K-edge XANES shows little change with increase in the content of Na2O in Na2O-SiO2 glasses. However, the addition of P into the Na2O-SiO2 system causes dramatic change of the Na K-edge XANES, and the Na K-edge spectra of Na2O-SiO2-P2O5 glasses also change with the increase of P2O5 content. The structural role of Mg in CaMgSi2O6 (Di)--NaAlSi3O8 (Ab) glasses was studied using Mg K-edge XANES spectra. The Mg-O bond distance in these glasses is estimated to be 2.00 +/- 0.04 A. Thus, Mg in these glasses may be five coordinated with oxygen, or Mg may have multiple structural sites, MgIV, MgV and MgVI. The Di-Ab glasses may possess a medium-range ordering structure. |
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| Keywords: | Glasses of sodium and magnesium Coordination and local structure of sodium and magnesium XANES (X-ray near edge structure) |
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