Raman spectroscopic study of the vivianite arsenate minerals

Frost, Ray L., Martens, Wayde N., Williams, Peter, & Kloprogge, J. Theo (2003) Raman spectroscopic study of the vivianite arsenate minerals. Journal of Raman Spectroscopy, 34(10), pp. 751-759.


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The molecular structures of the vivianite-type arsenate minerals were studied using a combination of Raman and infrared spectroscopy. The Raman spectra of the hydroxyl-stretching regions are complex with overlapping bands at 3419, 3209, 3185 and 3010 cm-1. This complexity is reflected in the water HOH bending modes with strong infrared bands in the 1660-1685 cm-1 region indicating strong hydrogen bonding to arsenate anions in adjacent layers. The Raman arsenate AsO stretching region shows strong similarity between the vivianite arsenate minerals. In the infrared spectra complexity exists with multiple antisymmetric stretching vibrations observed, indicating a reduction of symmetry. Strong infrared bands around 700 and 560 cm-1 are attributed to librational modes of water. Vibrational spectra enable the structure of the minerals to be determined and, whilst similarities exist in the spectral patterns, sufficient differences exist to determine the identification of the minerals. In particular, Raman spectroscopy assists in the identification of the complex isomorphous substitution in these vivianite arsenate minerals.

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44 citations in Scopus
43 citations in Web of Science®
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ID Code: 21993
Item Type: Journal Article
Refereed: Yes
DOI: 10.1002/jrs.1049
ISSN: 0377-0486
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2003 John Wiley and Sons
Deposited On: 17 Jun 2009 13:03
Last Modified: 24 Jun 2017 14:40

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