Raman Spectroscopy of The Joaquinite Minerals
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Description
Selected joaquinite minerals have been studied by Raman spectroscopy. The minerals are categorised into two groups depending upon whether bands occur in the 3250 to 3450 cm-1 region and in the 3450 to 3600 cm-1 region or in the latter region only. The first set of bands is attributed to water stretching vibrations and the second set to OH stretching bands. In the literature X-ray diffraction could not identify the presence of OH units in the structure of joaquinite. Raman spectroscopy proves that the joaquinite mineral group contain OH units in their structure and in some cases both water and OH units. A series of bands at 1123, 1062, 1031, 971, 912 and 892 cm-1 are assigned to SiO stretching vibrations. Bands above 1000 cm-1 as attributable to νas modes of the (SiO4)4- and (Si2O7)6- units. Bands are observed at 738, around 700, 682, around 668, 621 and 602 cm-1 are attributed to O-Si-O bending modes. The patterns do not appear to match the published infrared patterns of either (SiO4)4- or (Si2O7)6- units. The reason is attributed to the actual formulation of the joaquinite mineral in which significant amounts of Ti or Nb and Fe are found.
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ID Code: | 9002 |
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Item Type: | Contribution to Journal (Journal Article) |
Refereed: | Yes |
Measurements or Duration: | 5 pages |
Keywords: | Barrio-Orthojoaquinite, Joaquinite-(Ce), Orthojoaquinite, Raman Spectroscopy, Silicate, Strontiojoaquinite |
DOI: | 10.1002/jrs.1711 |
ISSN: | 0377-0486 |
Pure ID: | 33725951 |
Divisions: | Past > QUT Faculties & Divisions > Faculty of Science and Technology Past > QUT Faculties & Divisions > Science & Engineering Faculty Current > Research Centres > Australian Research Centre for Aerospace Automation |
Copyright Owner: | Consult author(s) regarding copyright matters |
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
Deposited On: | 16 Aug 2007 00:00 |
Last Modified: | 30 Mar 2024 21:21 |
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