Raman spectroscopic study of the tellurite minerals: rajite and denningite

Frost, Ray L. and Dickfos, Marilla J. and Keeffe, Eloise C. (2008) Raman spectroscopic study of the tellurite minerals: rajite and denningite. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, In Press. pp. 1512-1515. (In Press)

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DOI: 10.1016/j.saa.2008.05.012

Abstract

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 rajite and denningite are examples of group (d). Minerals of the tellurite group are porous zeolite-like materials. Raman bands for rajite observed at 740, and 676 and 667 cm-1 are attributed to the ν1 (Te2O5)2- symmetric stretching mode and the ν3 (TeO3)2- antisymmetric stretching modes respectively. A second rajite mineral sample provided a more complex raman spectrum with Raman bands at 754 and 731 cm-1 assigned to the ν1 (Te2O5)2- symmetric stretching modes and two bands at 652 and 603 cm-1 are accounted for by the ν3 (Te2O5)2- antisymmetric stretching mode. The Raman spectrum of dennigite displays an intense band at 734 cm-1 attributed to the ν1 (Te2O5)2- symmetric stretching mode with a second Raman band at 674 cm-1 assigned to the ν3 (Te2O5)2- antisymmetric stretching mode. Raman bands for rajite, observed at (346, 370) and 438 cm-1 are assigned to the (Te2O5)2- ν2 (A1) bending mode and ν4 (E) bending modes.

ID Code:	15300
Item Type:	Journal Article
Keywords:	tellurite, tellurate, Raman spectroscopy, rajite, denningite
ISSN:	1386-1425
Subjects:	Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606) Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions:	QUT Faculties and Divisions > Faculty of Science and Technology
Copyright Owner:	Copyright 2008 Elsevier
Copyright Statement:	Reproduced in accordance with the copyright policy of the publisher.
Deposited On:	22 Oct 2008
Last Modified:	02 Jan 2010 01:53

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