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Raman spectroscopic study of the uranyl selenite mineral marthozite Cu[(UO 2 ) 3 (SeO 3 ) 2 O 2 ]·8H 2 O
Author(s) -
Frost Ray L.,
Čejka Jiří,
Keeffe Eloise C.,
Dickfos Marilla J.
Publication year - 2008
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.2013
Subject(s) - uranyl , raman spectroscopy , bond length , chemistry , analytical chemistry (journal) , crystallography , hydrogen bond , infrared spectroscopy , uranium , crystal structure , materials science , molecule , physics , organic chemistry , chromatography , optics , metallurgy , ion
Abstract The mineral marthozite, a uranyl selenite, has been characterised by Raman spectroscopy at 298 K. The bands at 812 and 797 cm −1 were assigned to the symmetric stretching modes of the (UO 2 ) 2+ and (SeO 3 ) 2− units, respectively. These values gave the calculated UO bond lengths in uranyl of 1.799 and/or 1.814 Å. Average UO bond length in uranyl is 1.795 Å, inferred from the X‐ray single crystal structure analysis of marthozite by Cooper and Hawthorne. The broad band at 869 cm −1 was assigned to the ν 3 antisymmetric stretching mode of the (UO 2 ) 2+ (calculated UO bond length 1.808 Å). The band at 739 cm −1 was attributed to the ν 3 antisymmetric stretching vibration of the (SeO 3 ) 2− units. The ν 4 and the ν 2 vibrational modes of the (SeO 3 ) 2− units were observed at 424 and 473 cm −1 . Bands observed at 257, and 199 and 139 cm −1 were assigned to OUO bending vibrations and lattice vibrations, respectively. OH···O hydrogen bond lengths were inferred using Libowiztky's empirical relation. The infrared spectrum of marthozite was studied for complementation. Copyright © 2008 John Wiley & Sons, Ltd.