QUT ePrints

The Garfield and Uley nontronites : an infrared spectroscopic comparison

Frost, Ray L. & Kloprogge, J. Theo (2002) The Garfield and Uley nontronites : an infrared spectroscopic comparison. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 58A(9), pp. 1881-1894.

View at publisher

Abstract

FTIR and Infrared emission spectroscopy (IES) has been used to characterise the Uley (Australian) and Garfield nontronites. These clay minerals are characterised by a strong emission band at 3570 cm-1 attributed to the FeFeOH unit. Dehydroxylation is followed by the loss of intensity of this band as a function of temperature. Dehydroxylation is also followed by the loss of intensity of the FeFeOH deformation vibration at 843 cm-1. IES shows that the dehydroxylation occurs as a continuous process in comparison to DTA/TGA studies where the dehydroxylation occurs abruptly at 425 degrees Celsius. Water in these high iron bearing smectites have been observed through the stretching mode at 3430 cm-1 and the bending mode at 1630 cm-1. Different types of water are identified in the nontronite structure by the analysis of the band profile in the 1590 to 1680 cm-1 region. Low frequency vibrations show that the Uley green nontronite is similar to the Garfield nontronite. The brown Uley nontronite is closer to the Hohen-Hagen nontronite. The Uley nontronites may therefore be used spectroscopically to replace other nontronites as a reference clay mineral.

Impact and interest:

14 citations in Scopus
Search Google Scholar™
14 citations in Web of Science®

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

483 since deposited on 18 May 2005
79 in the past twelve months

Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 1080
Item Type: Journal Article
Keywords: dehydroxylation, FT, IR, infrared emission spectroscopy, montmorillonite, nontronite, smectite
DOI: 10.1016/S1386-1425(01)00638-2
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2002 Elsevier
Deposited On: 18 May 2005
Last Modified: 04 Sep 2014 13:03

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page