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Raman spectroscopic study of the uranyl carbonate mineral čejkaite and its comparison with synthetic trigonal Na 4 [UO 2 (CO 3 ) 3 ]
Author(s) -
Čejka Jiří,
Sejkora Jiří,
Plášil Jakub,
Bahfenne Silmarilly,
Palmer Sara J.,
Frost Ray L.
Publication year - 2010
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2349
Subject(s) - raman spectroscopy , uranyl , triclinic crystal system , chemistry , infrared , bond length , crystallography , trigonal crystal system , carbonate , mineral , infrared spectroscopy , crystal structure , molecular vibration , analytical chemistry (journal) , organic chemistry , physics , optics , ion
Raman and infrared spectroscopies were used to characterise two samples of triclinic čejkaite Na 4 [UO 2 (CO 3 ) 3 ] and its synthetic trigonal analogue. The ν 3 (UO 2 ) 2+ mode is not Raman active, whereas both the ν 3 and ν 1 (UO 2 ) 2+ modes are infrared active. UO bond lengths in uranyls were calculated from the spectra obtained and compared with bond lengths derived from crystal structure analyses. From the higher number of bands related to the uranyl and carbonate vibrations, the presence of symmetrically distinct (UO 2 ) 2+ and (CO 3 ) 2− units in both structures is proposed. Copyright © 2009 John Wiley & Sons, Ltd.