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Site-selective spectroscopy in Eu3+ doped alpha-cordierite
Alternative TitleEur. J. Solid State Inorg. Chem.
Piriou, B; Chen, YF; Vilminot, S
1998-04-01
Source PublicationEUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY
ISSN0992-4361
Volume35Issue:4-5Pages:341-355
AbstractThe location of Eu3+ in alpha-cordierite, synthesized by a sol-gel route, was investigated by using both site-selective spectroscopy and time-resolved spectroscopy. F-7(0) --> D-5(1,2) excitation and D-5(0) --> F-7(0,1,2) emission spectra were performed at 77 K. The Eu3+ ions are distributed in two families : the A family in the structure channels and the B family at (4c) position of D-2h(16) in substitution for Mg2+. Four B subfamilies were characterized and understood as a difference at the second neighbours, i.e., the four possible occupations of the surrounding tetrahedra by Al and Si. The A family was characterized by anomalous spectra : strong D-5(0) --> F-7(0) transition, high position of the D-5(0), D-5(1) and D-5(2) levels and very targe F-7(1,2) splittings. By comparison with Eu-doped apatites, in which similar features occur, a predominant Eu-O bonding of covalent character with one of the oxygen ions bordering the channel was assumed. When the annealing temperature increases, Eu3+ ions migrate from the channel to the (4c) position.; The location of Eu3+ in alpha-cordierite, synthesized by a sol-gel route, was investigated by using both site-selective spectroscopy and time-resolved spectroscopy. F-7(0) --> D-5(1,2) excitation and D-5(0) --> F-7(0,1,2) emission spectra were performed at 77 K. The Eu3+ ions are distributed in two families : the A family in the structure channels and the B family at (4c) position of D-2h(16) in substitution for Mg2+. Four B subfamilies were characterized and understood as a difference at the second neighbours, i.e., the four possible occupations of the surrounding tetrahedra by Al and Si. The A family was characterized by anomalous spectra : strong D-5(0) --> F-7(0) transition, high position of the D-5(0), D-5(1) and D-5(2) levels and very targe F-7(1,2) splittings. By comparison with Eu-doped apatites, in which similar features occur, a predominant Eu-O bonding of covalent character with one of the oxygen ions bordering the channel was assumed. When the annealing temperature increases, Eu3+ ions migrate from the channel to the (4c) position.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
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Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear ; Chemistry, Physical
WOS IDWOS:000075073500003
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/6066
Collection研究所(批量导入)
Affiliation1.Ecole Cent Paris, URA CNRS 1907, Lab Physicochim Mol & Minerale, F-92295 Chatenay Malabry, France
2.IPCMS, UMR CNRS 7504, Grp Mat Inorgan, F-67037 Strasbourg, France
3.Acad Sinica, Inst Chem Met, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Piriou, B,Chen, YF,Vilminot, S. Site-selective spectroscopy in Eu3+ doped alpha-cordierite[J]. EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY,1998,35(4-5):341-355.
APA Piriou, B,Chen, YF,&Vilminot, S.(1998).Site-selective spectroscopy in Eu3+ doped alpha-cordierite.EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY,35(4-5),341-355.
MLA Piriou, B,et al."Site-selective spectroscopy in Eu3+ doped alpha-cordierite".EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY 35.4-5(1998):341-355.
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