Infrared transmission and emission spectroscopic study of selected Chinese palygorskites

Cheng, Hongfei, Yang, Jing, Frost, Ray L., & Wu, Zequang (2011) Infrared transmission and emission spectroscopic study of selected Chinese palygorskites. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 83(1), pp. 518-524.

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Infrared and infrared emission spectroscopy were used to analyze the difference in structure and thermal behavior of two Chinese palygorskites. The position of the main bands identified in the infrared spectra of the palygorskites studied is similar for these two Chinese samples, but there are some differences in their intensity, which is significant. This discrepancy is attributed to various geological environments in different regions and the existence of impurities. The infrared emission spectra clearly show the structural changes and dehydroxylation of the palygorskites when the temperature is raised. The dehydration of the palygorskites is followed by the loss of intensity of the OH stretching vibration bands in the region 3600-3200 cm-1. Dehydroxylation is followed by the decrease in intensity in the bands between 3700 and 3550 cm-1. Dehydration of pure palygorskite was completed by 600 °C. Partial loss of coordinated water was observed at 400 °C. Infrared emission spectroscopy is an effective method to determine the stability of the mineral.

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ID Code: 46413
Item Type: Journal Article
Refereed: Yes
Keywords: Infrared spectroscopy; Infrared emission spectroscopy; Palygorskite; Sepiolite
DOI: 10.1016/j.saa.2011.08.077
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2011 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 83(1), pp. 518-524 DOI: 10.1016/j.saa.2011.08.077
Deposited On: 12 Oct 2011 22:03
Last Modified: 26 Oct 2011 00:01

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