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A Raman spectroscopic study of high-uranium zircon from the Chernobyl "lava"

Thorsten Geisler, Boris E. Burakov, Vladimir Zirlin, Larisa Nikolaeva and Philipp Poeml
A Raman spectroscopic study of high-uranium zircon from the Chernobyl "lava" (in Micro- and mesoporous mineral phases, S. Merlino (editor))
European Journal of Mineralogy (December 2005) 17 (6): 883-894


Srongly zoned, high-uranium zircon which crystallized from melt formed during the accident at the Chernobyl nuclear power plant in 1986 has been studied by confocal Raman spectroscopy, EPMA and BSE imaging. The correlation between the Raman and EPMA data allowed the mode behaviour to be studied as a function of the U content. The crystals have a USiO (sub 4) content of 0.6-11.6 mol%, corresponding with 0.8-15.8 wt% UO (sub 3) . The frequency of the symmetrical and anti-symmetrical stretching mode decreases by 0.67 and 0.75 cm (super -1) per mol USiO (sub 4) , respectively, which is a result of increasing Si-O bond length with increasing U content. The line broadening, reflecting the range of local distortions (microscopic strain) is most pronounced for the lattice modes, in agreement with the large size difference of both cations. The E (sub g) lattice modes, involving the movement of the SiO (sub 4) tetrahedron and the cation within the a(b) plane, shows significantly larger line broadening with increasing U content than the B (sub 1g) modes, involving lattice vibrations along c, suggesting that the microscopic strain is significantly larger in the a(b) plane than along the c axis, which can be explained by the structural properties of zircon.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 17
Serial Issue: 6
Title: A Raman spectroscopic study of high-uranium zircon from the Chernobyl "lava"
Title: Micro- and mesoporous mineral phases
Affiliation: University of Muenster, Institut fuer Mineralogie, Munster, Federal Republic of Germany
Pages: 883-894
Published: 200512
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Meeting name: Micro- and mesoporous mineral phases
Meeting location: Rome, ITA, Italy
Meeting date: 20041206Dec. 6-7, 2004
References: 48
Accession Number: 2006-015612
Categories: Mineralogy of silicates
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
N51°16'00" - N51°16'00", E30°15'00" - E30°15'00"
Secondary Affiliation: V. G. Khlopin Radium Institute, RUS, Russian Federation
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200608
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