Raman spectroscopic study of the tellurite minerals : mackayite and quetzalcoatlite

Frost, Ray L. & Dickfos, Marilla J. (2009) Raman spectroscopic study of the tellurite minerals : mackayite and quetzalcoatlite. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 72(2), pp. 445-448.

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Tellurites may be subdivided according to formula and structure. There are five groups based upon the formulae (a) A(XO3), (b) A(XO3).xH2O, (c) A2(XO3)3.xH2O, (d) A2(X2O5) and (e) A(X3O8). Raman spectroscopy has been used to study mackayite and quetzalcoatlite are examples of tellurites containing OH units
Raman bands for mackayite observed at 732, 782 and 579, 635cm-1 are assigned to the ν1 (Te2O5)2- symmetric stretching and ν3 (Te2O5)2- antisymmetric stretching modes. The Raman spectral profile of quetzalcoatlite is more complex with a considerable number of overlapping bands. Two bands may be resolved at 719 and 754 cm-1 which may be attributed to ν1 (Te2O5)2- symmetric stretching mode. The two Raman bands of quetzalcoatlite at 602 and 606 cm-1 are accounted for by the ν3 (Te2O5)2- antisymmetric stretching mode. Raman bands for mackayite, observed at (306, 349, 379) and (424, 436 cm-1 are assigned to the (Te2O5)2- ν2 (A1) bending mode and ν4 (E) bending modes. This research shows that Raman spectroscopy may be applied to tellurite minerals successfully.

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ID Code: 17603
Item Type: Journal Article
Refereed: Yes
Keywords: tellurite, tellurate, Raman spectroscopy, mackayite, quetzalcoatlite, cliffordite, rajite, denningite
DOI: 10.1016/j.saa.2008.10.018
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2009 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher
Deposited On: 09 Feb 2009 03:34
Last Modified: 29 Feb 2012 14:02

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