Raman spectroscopy of natural oxalates at 298 and 77 K

Frost, Ray L. & Weier, Matt L. (2003) Raman spectroscopy of natural oxalates at 298 and 77 K. Journal of Raman Spectroscopy, 34(10), pp. 776-785.

View at publisher


A comparative study of a suite of natural oxalates including weddellite, whewellite, moolooite, humboldtine, glushinskite, natroxalate and oxammite was undertaken using Raman spectroscopy at 298 and 77 K. Oxalates are found as films on host rocks as a result of heavy metal expulsion by primitive plants such as lichens and fungi. The minerals are characterized by the Raman position of the CO stretching vibration, which is cation sensitive. The band is observed at 1468 cm-1 for weddellite, 1464 cm-1 for whewellite, 1489 cm-1 for moolooite, 1489 cm-1 for humboldtine, 1471 cm-1 for glushinskite, 1456 cm-1 for natroxalate and 1473 cm-1 for oxammite. Except for oxammite, the infrared and Raman spectra are mutually exclusive, indicating that the minerals are bidentate and planar. Significant differences are observed in the CC stretching region and in the OCO bending region centred upon 910 and 860 cm-1, respectively. The significance of this work rests with the ability of Raman spectroscopy to identify oxalates which often occur as a film on a host rock. As such, Raman spectroscopy has the potential to identify the existence or pre-existence of life forms on planets such as Mars.

Impact and interest:

75 citations in Scopus
Search Google Scholar™
74 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

247 since deposited on 17 Jun 2009
30 in the past twelve months

Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 22572
Item Type: Journal Article
Refereed: Yes
DOI: 10.1002/jrs.1052
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 13:16
Last Modified: 01 Mar 2012 21:21

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page