Crystal chemistry of iron in non-metamict chevkinite-(Ce): Valence state and site occupation proportions
文献类型：期刊论文
| 作者 | Yang Zhuming; Li He; Liu Milan; Pertlik, Franz |
| 刊名 | JOURNAL OF RARE EARTHS
 |
| 出版日期 | 2007-04-01 |
| 卷号 | 25期号:2页码:238-242 |
| 关键词 | chevkinite-(Ce) Mossbauer spectroscopy valence state bond length rare earths |
| ISSN号 | 1002-0721 |
| 文献子类 | Article |
| 英文摘要 | The ideal formula for chevkinite can be expressed as A(4)BC(2)D(2)Si(4)O(22). It is important to determine the valence state and site occupation proportions for Fe among the B, C, and D octahedral sites as it may help to identify different species in the chevkinite group. Non-metainict chevkinite-(Ce) from Mianxi alkali feldspar-granite, Sichuan Province, China, was investigated using Mossbauer spectroscopy. The Fe3+/Sigma Fe ratio was 39.2%. A significant increase of Fe3+ occured during metamictization and annealing for chevkinite-group minerals. In metamict samples Fe tended to lower coordination. According to the correlation between bond length and isomer shift (IS), the quadrupole doublets with IS = 1.10 and 0.94 mm (.) s(-1) can be assigned to Fe2+ in the B and C octahedral sites, respectively. Based on the correlation between octahedral distortion and quadrupole splitting (QS), the quadrupole doublets with QS = 0.86 and 0.77 mm (.) s(-1) can be assigned to Fe2+ in the C and D sites, respectively. The simplified formula can be revised as: Ce4Fe2+ (Ti, Fe2+, Fe3+)(2)(Ti, Fe3+)(2)Si-4(O, OH)(22). It indicated that the non-metamict chevkinite-(Ce) belonged to Fe2+ end member of the chevkinite group because Fe2+ was the predominant component in the B site. |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000246196500022 |
| 出版者 | METALLURGICAL INDUSTRY PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67350]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang Zhuming |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Jilin Univ, Anal Test Ctr, Changchun 130021, Peoples R China 3.Univ Vienna, Geozentre, Inst Mineral & Crystallog, A-1090 Vienna, Austria |
| 推荐引用方式 GB/T 7714 | Yang Zhuming,Li He,Liu Milan,et al. Crystal chemistry of iron in non-metamict chevkinite-(Ce): Valence state and site occupation proportions[J]. JOURNAL OF RARE EARTHS,2007,25(2):238-242. |
| APA | Yang Zhuming,Li He,Liu Milan,&Pertlik, Franz.(2007).Crystal chemistry of iron in non-metamict chevkinite-(Ce): Valence state and site occupation proportions.JOURNAL OF RARE EARTHS,25(2),238-242. |
| MLA | Yang Zhuming,et al."Crystal chemistry of iron in non-metamict chevkinite-(Ce): Valence state and site occupation proportions".JOURNAL OF RARE EARTHS 25.2(2007):238-242. |
入库方式： OAI收割
来源：地质与地球物理研究所
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