An updated model of Rietveld structure refinement of Na/K-feldspar
文献类型：期刊论文
| 作者 | Liu, Shanke; Li, Jiaju; Liu, Jianming |
| 刊名 | PERIODICO DI MINERALOGIA
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 86期号:1页码:75-85 |
| 关键词 | alkali feldspar crystal structure Rietveld refinement X-ray powder diffraction |
| ISSN号 | 0369-8963 |
| DOI | 10.2451/2017PM684 |
| 文献子类 | Article |
| 英文摘要 | Alkali feldspar is highly abundant on earth, and studies of its structure are very important in geology. When a single crystal is unavailable for alkali feldspar in some cases, X-ray powder diffraction (XRPD) is essential. However, some problems on extracting high quality structural data of Na/K feldspar from XRPD exist, such as deviation of Al/Si-O bond length from expected value, difficulty in identifying Al and Si elements with similar scattering power because of their same crystallographic site, and severe overlapping of diffraction peaks caused by a low symmetry of crystal structure. To extract high-quality structural data, two equations related to Si/Al-O bond length and Si/Al occupancy in terms of the crystal structure database were respectively calculated for albite and microcline. A better model was established by tactically combining the two equations and soft distance constraints for Al/Si-O bond lengths. Application of the updated model successfully obtained high-quality structural data from two different samples using Bragg-Brentano XRPD via the Rietveld method with the general structure analysis system. The reliability of these structural data for low-symmetry albite and microcline was discussed by comparing the data with the results of previous studies. |
| WOS关键词 | RAY-POWDER DIFFRACTION ; CRYSTAL-STRUCTURES ; HIGH ALBITE ; X-RAY ; THERMAL-EXPANSION ; PLAGIOCLASE FELDSPARS ; MICROCLINE ; TEMPERATURE ; KAOLINITE ; POSITIONS |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000405162700006 |
| 出版者 | EDIZIONI NUOVA CULTURA |
| 资助机构 | Institute of Geology and Geophysics, Chinese Academy of Sciences ; Institute of Geology and Geophysics, Chinese Academy of Sciences ; Institute of Geology and Geophysics, Chinese Academy of Sciences ; Institute of Geology and Geophysics, Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/46366]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Liu, Shanke |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Shanke,Li, Jiaju,Liu, Jianming. An updated model of Rietveld structure refinement of Na/K-feldspar[J]. PERIODICO DI MINERALOGIA,2017,86(1):75-85. |
| APA | Liu, Shanke,Li, Jiaju,&Liu, Jianming.(2017).An updated model of Rietveld structure refinement of Na/K-feldspar.PERIODICO DI MINERALOGIA,86(1),75-85. |
| MLA | Liu, Shanke,et al."An updated model of Rietveld structure refinement of Na/K-feldspar".PERIODICO DI MINERALOGIA 86.1(2017):75-85. |
入库方式： OAI收割
来源：地质与地球物理研究所
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