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Short communication: near- and mid-infrared spectroscopy of the lithium-bearing amphibole holmquistite from Barraute, Canada

Kloprogge, J. Theo, Duong, Loc V., Martens, Wayde N., Frost, Ray L., & Visser, Diederik (2006) Short communication: near- and mid-infrared spectroscopy of the lithium-bearing amphibole holmquistite from Barraute, Canada. Journal of Near Infrared Spectroscopy, 14(3), pp. 209-212.

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Abstract

The mid- and near-infrared spectra of holmquistite, a lithium-containing orthorhombic amphibole, from Barraute (Quebec, Canada) has been measured The OH-stretching region is characterised by bands around 3660, 3645, 3629 and 3613 cm-1 assigned to (3Mg)-OH, (2Mg + Fe2+)-OH, (Mg + 2Fe2+)-OH and (3Fe2+)-OH, respectively. Based on the ratio between the 3645 and 3660 cm-1 bands Fe2+/(Fe2+ + Mg2+) ratios in the M1 and M3 sites were determined to be in the range between 0.35 and 0.45. In the near-infrared region two times four bands were observed associated with the four possible combination modes of the four M-OH stretching and bending modes around 4029, 4193, 4323 and 4400 cm-1 and with the four overtones of M-OH stretching modes around 7055, 7091, 7123 and 7155 cm-1.

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ID Code: 5409
Item Type: Journal Article
Additional Information: Self-archiving of the author-version is not yet supported by this publisher. For more information, please refer to the journal's website (see link) or contact the author. Author contact details: r.frost@qut.edu.au
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Keywords: amphibole, holmquistite, mid, infrared spectroscopy, near, infrared spectroscopy
ISSN: 0967-0335
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Mineralogy and Crystallography (040306)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2006 NIR Publications
Deposited On: 08 Nov 2006
Last Modified: 29 Feb 2012 23:26

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