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Wang C, Chen X, Wei R, Gong Y. Raman Spectroscopic and Theoretical Study of Scandium Fluoride and Oxyfluoride Anions in Molten FLiNaK. J Phys Chem B 2020; 124:6671-6678. [PMID: 32633524 DOI: 10.1021/acs.jpcb.0c06021] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The speciation in the FLiNaK-ScF3 and FLiNaK-ScF3-Li2O melts above 873 K was investigated by Raman spectroscopy and density functional theory (DFT) calculations. Binary scandium fluoride anions in the form of ScF52- and ScF63- were identified in molten FLiNaK containing 20 mol % ScF3, which were not affected by either temperature or alkali cations in molten fluoride. With the addition of Li2O into the FLiNaK-ScF3 (20 mol %) melt, ternary scandium oxyfluoride anion Sc2OF62- was formed and dominated the spectrum, and it was characterized to possess a linear Sc-O-Sc geometry with two ScF3 moieties bridged by a single oxygen atom. Further increase in Li2O content to 40 mol % resulted in the formation of the second oxyfluoride anion Sc2O2F64- containing a rhombic Sc2O2 ring, while the Raman bands due to Sc2OF62- disappeared. When the Li2O concentration went beyond 40 mol %, the sample was no longer homogeneous due to the appearance of insoluble scandium oxide on the surface of the melt, suggesting that scandium oxide is formed via the reactions of ScF52- and ScF63- with O2- in molten FLiNaK mediated by Sc2OF62- and Sc2O2F64-.
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Affiliation(s)
- Chenyang Wang
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuting Chen
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Rui Wei
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Gong
- Department of Radiochemistry, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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Spectra, Energy Levels and Energy Transfer in High Symmetry Lanthanide Compounds. TRANSITION METAL AND RARE EARTH COMPOUNDS 2012. [DOI: 10.1007/b96863] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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A. J. BERRY I. D. MORRISON R. G. DE. Energy levels of terbium(III) in the elpasolite Cs2NaTbF6. Mol Phys 2010. [DOI: 10.1080/002689798169384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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A new approach and some criteria to deal with the theory of the normal modes of vibrations in the elpasolite stoichiometric type systems short range intramolecular interactions. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2007.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zhou X, Reid MF, Faucher MD, Tanner PA. Electronic Spectra of Cs2NaYbF6 and Crystal Field Analyses of YbX63- (X = F, Cl, Br). J Phys Chem B 2006; 110:14939-42. [PMID: 16869607 DOI: 10.1021/jp057241j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Detailed analysis of the vibronic structure in the electronic absorption spectrum of Cs2NaYbF6 at temperatures between 10 and 300 K enables the crystal field energy level diagram of Yb3+ in this cubic host to be deduced. Ultraviolet and visible laser excitation of Cs2NaYbF6, Cs2NaY(0.9)Yb(0.1)F6, and Cs2NaHo(0.99)Yb(0.01)F6 give spectral features mainly due to Yb3+ being situated at a range of defect sites. The 4f13 crystal field analyses of octahedral YbX6(3-) (X = F, Cl, Br) systems show the expected trends in parameter values, but the energy level fits are poor. Inclusion of the interaction with the charge-transfer configuration 4f14np5 provides an exact fitting of energy levels for YbX6(3-), and a smooth variation of ff and fp crystal field parameters for Cs2NaLnCl6 (Ln = Er, Tm, Yb) is observed.
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Affiliation(s)
- Xianju Zhou
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., PRC
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Boldyrev AI, Gutowski M, Simons J. Small Multiply Charged Anions as Building Blocks in Chemistry. Acc Chem Res 1996. [DOI: 10.1021/ar960147o] [Citation(s) in RCA: 159] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander I. Boldyrev
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, and Department of Chemistry, University of Gdansk, 80-952 Gdansk, Poland
| | - Maciej Gutowski
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, and Department of Chemistry, University of Gdansk, 80-952 Gdansk, Poland
| | - Jack Simons
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, and Department of Chemistry, University of Gdansk, 80-952 Gdansk, Poland
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Acevedo R, Tanner PA, Meruane T, Poblete V. Vibronic intensities in the absorption spectra of Yb3+. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:3976-3988. [PMID: 9986298 DOI: 10.1103/physrevb.54.3976] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gutowski M, Boldyrev AI, Simons J, Rak J, Błażejowski J. Properties of Closed-Shell, Octahedral, Multiply-Charged Hexafluorometallates MF63-, M = Sc, Y, La, ZrF62-, and TaF6-. J Am Chem Soc 1996. [DOI: 10.1021/ja952412r] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maciej Gutowski
- Contribution from the Departments of Chemistry, University of Utah, Salt Lake City, Utah 84112, and University of Gdańsk, 80-952 Gdańsk, Poland
| | - Alexander I. Boldyrev
- Contribution from the Departments of Chemistry, University of Utah, Salt Lake City, Utah 84112, and University of Gdańsk, 80-952 Gdańsk, Poland
| | - Jack Simons
- Contribution from the Departments of Chemistry, University of Utah, Salt Lake City, Utah 84112, and University of Gdańsk, 80-952 Gdańsk, Poland
| | - Janusz Rak
- Contribution from the Departments of Chemistry, University of Utah, Salt Lake City, Utah 84112, and University of Gdańsk, 80-952 Gdańsk, Poland
| | - Jerzy Błażejowski
- Contribution from the Departments of Chemistry, University of Utah, Salt Lake City, Utah 84112, and University of Gdańsk, 80-952 Gdańsk, Poland
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Amberger HD. Zur Elektronenstruktur hochsymmetrischer Verbindungen der Lanthanoiden und Actinoiden. XIII. Cs2KYF6- ein f�r spektroskopische Untersuchungen an Verd�nnten Fluoroelpasolithen besonders geeignetes Wirtsgitter. Z Anorg Allg Chem 1980. [DOI: 10.1002/zaac.19804670127] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zur elektronenstruktur hochsymmetrischer verbindungen der f-elemente XI (1) elektronisches Raman-spektrum und kristallfeld-aufspaltungsmuster der grundmannigfaltigkeit 3H4 von Cs2KPrIIIF6. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/0020-1650(78)80020-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Schittenhelm HJ, Kemmler-Sack S. �ber die Polymorphie der Perowskite Ba2SE0,67WVIO6. II. Die Systeme Ba2Nd0,67(1?x) Y0,67xWO6 und Ba2Nd0,67W1?xUxO6. Z Anorg Allg Chem 1977. [DOI: 10.1002/zaac.19774310113] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kemmler-Sack S, Jooss I. Gibt es ?Wolframylgruppierungen?? �ber Perowskitphasen im System Ba2Y0,67UO6?Ba2CaWO6. Z Anorg Allg Chem 1977. [DOI: 10.1002/zaac.19774290124] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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