Transmission electron microscopic study of new, regular, mixed-layer structures in calcium-rare-earth fluorocarbonate minerals
文献类型：期刊论文
| 作者 | X. L. Wu ; D. W. Meng ; Z. L. Pan ; G. M. Yang ; D. X. Li |
| 刊名 | Mineralogical Magazine
 |
| 出版日期 | 1998 |
| 卷号 | 62期号:1页码:55-64 |
| 关键词 | Ca-RE fluorocarbonate mineral mixed-layer structure high-resolution transmission electron microscopy |
| ISSN号 | 0026-461X |
| 中文摘要 | Structures of calcium-rare-earth (Ca-RE) fluorocarbonate minerals from southwest China have been investigated using selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM). They are described as combinations of layers of bastnasite-(Ce), CeFCO3 (B layers), and synchysite-(Ce), CeFCO3-CaCO3 (S layers) (Donnay and Donnay, 1953). We report here the discovery of six new, regular, mixed-layer structures in parisite-(Ce) observed using SAED and HRTEM. The symmetry, cell parameters, chemical formulae and stacking of the structural unit layers, etc., were determined for each. The regular, mixed-layer structures are formed by stacking unit layers of bastnasite-(Ce) and synchysite-(Ce) in varying proportions along the c axis. HRTEM shows that there are different distribution modes for the Ce-F ion layers, the CO3 inn groups between the Ce-F ion layers and the CO3 ion groups between the Ce-F and Ca ion layers. The minerals may be regarded as polymorphs with the same chemical composition and the same spacing of the unit layers, but different arrangements of ion layers in the structural unit layers and different stacking sequences of the structural unit layers. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37824]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. L. Wu,D. W. Meng,Z. L. Pan,et al. Transmission electron microscopic study of new, regular, mixed-layer structures in calcium-rare-earth fluorocarbonate minerals[J]. Mineralogical Magazine,1998,62(1):55-64. |
| APA | X. L. Wu,D. W. Meng,Z. L. Pan,G. M. Yang,&D. X. Li.(1998).Transmission electron microscopic study of new, regular, mixed-layer structures in calcium-rare-earth fluorocarbonate minerals.Mineralogical Magazine,62(1),55-64. |
| MLA | X. L. Wu,et al."Transmission electron microscopic study of new, regular, mixed-layer structures in calcium-rare-earth fluorocarbonate minerals".Mineralogical Magazine 62.1(1998):55-64. |
入库方式： OAI收割
来源：金属研究所
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