A Raman spectroscopic study of the uranyl phosphate mineral parsonsite

Frost, Ray L., Cejka, Jiri, Weier, Matt L., & Martens, Wayde N. (2006) A Raman spectroscopic study of the uranyl phosphate mineral parsonsite. Journal of Raman Spectroscopy, 37(9), pp. 879-891.

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Abstract

The mineral parsonsite with samples from The Ranger Uranium Mine, Australia and La Faye Mine, Grury, Saone-et-Loire, Burgundy, France has been characterised by Raman spectrocopy at 298 and 77 K and complemented with infrared spectroscopy. Two Raman bands close to 807 and 796 cm-1 are attributed to the ○1 (UO2)2+ symmetric stretching modes, whilst two bands close to 953 or 945 cm-1 and 863-873 cm-1 are assigned to the ○3 (UO2)2+ antisymmetric stretching vibrations. Four or five bands (953, 926, 910, 883 cm-1) are observed in the infrared spectrum in this region . Bands at 965-967 and 972 cm-1 are assigned to the ○1 (PO4)3- symmetric stretching modes and bands that are observed in the 987 to 1078 cm-1 to the ○3 (PO4)3- antisymmetric stretching modes. Bands at 465, 439, 406, 394 cm-1 (298 K) and 466, 442, 405, 395 cm-1 (77 K) are assigned to the split doubly degenerate ○2 (PO4)-3 bending vibrations. Bands of very low intensity at 609, 595, 591, 582, 560 and 540 cm-1 are attributed to the split triply degenerate ○4 (PO4)-3 bending modes. Bands observed at wavenumbers lower than 300 cm-1 are connected with the split ○2 (¦) (UO2)2+ bending, ○ (U-Oligand), ¦ (U-Oligand), and lattice vibrations. U-O bond lengths in uranyl are calculated frm the Raman and infrared spectra which are in agreement with those from available X-ray single crystal structure analysis of parsonsite. Short comment is given to the water content and possibility of a hydrogen bonding network in parsonsite crystal structure.

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ID Code: 5150
Item Type: Journal Article
Refereed: Yes
Additional Information: This is one of a series of manuscripts on the Raman spectroscopic study of uranium minerals.
Keywords: parsonite, threadgoldite, phosphate, Raman spectroscopy, U, O bond length, uranyl, molecular water
DOI: 10.1002/jrs.1517
ISSN: 0377-0486
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2006 John Wiley & Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 06 Oct 2006 00:00
Last Modified: 29 Feb 2012 13:24

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