Abstract
Smectites including the iron-bearing smectites have proved difficult to measure using the techniques of Raman spectroscopy. The use of Fourier transform (FT)-Raman spectrometers using indium-gallium-arsenide detectors has enabled the spectra of a selection of high iron-bearing smectites and nontronites to be measured. Low-intensity hydroxyl stretching Raman bands were found at 3436 and 3355cm -1 and are attributed to the Fe-FeOH unit. Low-frequency bands were observed at around 201, 163, 128, and 90cm -1. The 90cm -1 band is ascribed to the stretching vibration of the hydrated cation. Bands observed at around 780 and 880cm -1 are ascribed to the hydroxyl deformation modes of the Fe-FeOH and Fe-AlOH. Index Headings: Ferruginous smectite; FT-Raman spectroscopy; Montmorillonite; Nontronite; Smectite.
PDF Article
More Like This
Remote Raman spectroscopy of natural rocks
Genesis Berlanga, Tayro E. Acosta-Maeda, Shiv K. Sharma, John N. Porter, Przemyslaw Dera, Hannah Shelton, G. Jeffrey Taylor, and Anupam K. Misra
Appl. Opt. 58(32) 8971-8980 (2019)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription