The interlayer structure of trioctahedral lithian micas: An AXANES spectroscopy study at the potassium K-edge
Cibin, G; Mottana, A; Marcelli, A; Cinque, G; Xu, W; Wu, ZY; Brigatti, MF; Xu W(徐伟); Wu ZY(吴自玉)
刊名AMERICAN MINERALOGIST
2010
卷号95期号:7页码:1084-1094
关键词Polylithionite siderophyllite X-ray absorption pleochroism XAFS XANES MXAN
学科分类Geochemistry & Geophysics; Mineralogy
DOI10.2138/am.2010.3344
通讯作者[Cibin, Giannantonio ; Mottana, Annibale] Univ Roma Tre, Dipartimento Sci Geol, I-00146 Rome, Italy ; [Cibin, Giannantonio ; Mottana, Annibale ; Marcelli, Augusto ; Cinque, Gianfelice ; Wu, Ziyu] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00040 Frascati Rm, Italy ; [Xu, Wei ; Wu, Ziyu] Inst High Energy Phys, BSRF, Beijing 100049, Peoples R China ; [Wu, Ziyu] Univ Sci & Technol China, NSRL, Hefei 230026, Peoples R China ; [Brigatti, Maria Franca] Univ Modena & Reggio Emilia, Dipartimento Sci Terra, I-41100 Modena, Italy
文章类型Article
英文摘要We recorded angle-dependent XANES (AXANES) spectra at the potassium K-edge for three compositionally intermediate polylithionite-siderophyllite trioctahedral 1M-micas using polarized synchrotron radiation. We evaluated the experimental spectra for both their in-plane and out-of-plane component fractions of the electric dipole contribution using the analytical formulae of Brouder (1990), referring to theory to extract the origin of their multiple-scattering pathways of Natoli et al. (2003). This analysis was extended to a fourth lithian mica studied previously and allowed characterization of the local environment and ordering around the potassium atoms in the interlayer of the entire set of micas. The AXANES in-plane components are notably similar to the XANES spectra recorded on randomly oriented powders, provided these are oriented at the "magic angle" (Pettifer et al. 1992). Most observed contributions arise from multiple-scattering interactions of the photoelectron ejected from the potassium absorber colliding with atoms located in the interlayer itself. Note that this includes not only interactions with other coplanar potassium and/or alkali atoms distributed along the interlayer plane, but also with their near- and next-nearest neighboring oxygen atoms which lie on the basal planes of the tetrahedral sheets facing the interlayer. By contrast, the AXANES out-of-plane component suggests that several multiple-scattering pathways cross the energetic and structural-barrier represented by the tetrahedral sheets. They reach not only the X anions that are located on the upper level of the octahedral sheets, at the center of the open cavity in the tetrahedral sheet, but also the metal cations centering the octahedral sheet itself. Therefore, the out-of-plane components provide indirect information on the number of independent octahedral sites, the cation oxidation state, and the trans- vs. cis-orientation of the anionic sites.
类目[WOS]Geochemistry & Geophysics ; Mineralogy
研究领域[WOS]Geochemistry & Geophysics ; Mineralogy
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语种英语
WOS记录号WOS:000279737700023
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239020
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
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Cibin, G,Mottana, A,Marcelli, A,et al. The interlayer structure of trioctahedral lithian micas: An AXANES spectroscopy study at the potassium K-edge[J]. AMERICAN MINERALOGIST,2010,95(7):1084-1094.
APA Cibin, G.,Mottana, A.,Marcelli, A.,Cinque, G.,Xu, W.,...&吴自玉.(2010).The interlayer structure of trioctahedral lithian micas: An AXANES spectroscopy study at the potassium K-edge.AMERICAN MINERALOGIST,95(7),1084-1094.
MLA Cibin, G,et al."The interlayer structure of trioctahedral lithian micas: An AXANES spectroscopy study at the potassium K-edge".AMERICAN MINERALOGIST 95.7(2010):1084-1094.
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