Publication
- Names
-
- Alian Wang
- John J. Freeman
- Bradley L. Jolliff
- Title
- Understanding the Raman spectral features of phyllosilicates
- Abstract
- Phyllosilicates, one of the five major structural types of silicates, have highly variable structures and very complex chemistry. This manuscript reports the first comprehensive Raman spectroscopic study of the five major groups of phyllosilicates. We first demonstrate that phyllosilicates have a unique Raman spectral pattern that can be used to distinguish them from orthosilicate, chain silicate, ring silicate, and framework silicate with different degrees of silicate polymerization. Second, we distinguish characteristics of Raman spectral features associated with phyllosilicates of the different stacking sequences and show how minor changes in chemical compositions and structural details in some phyllosilicates can affect their Raman spectral patterns, peak positions, and peak widths. From this study, we extract several empirical rules that can help to identify and characterize phyllosilicates based on in situ Raman spectroscopic measurements. These results are significant for planetary surface exploration, especially Mars, where the existence of phyllosilicates as a result of alteration of primary minerals has been indicated by Vis-Near IR spectroscopy used in orbital remote sensing and recently by X-ray diffraction in surface exploration. The spectral data collected from this study are also useful for laboratory study of terrestrial phyllosilicate samples. Copyright © 2015 John Wiley & Sons, Ltd.
- Keywords
- Raman spectroscopy, phyllosilicates, planetary exploration, Mars
- Year
- 2015
- Journal
- Journal of Raman Spectroscopy
- Volume
- 46
- Number
- 10
- Pages
- 829 - 845
- Document type
- article
- Publication state
- published
- Doi
- 10.1002/jrs.4680
- Identifiers
-
- bibcode: https://doi.org/10.1002/jrs.4680
- Experiment/Spectra
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- Normalized Raman spectrum of $(Mg,Ca)_{0,7}(Mg,Fe,Al)_6(Al,Si)_8O_{22}(OH)_4 \cdot 8H_2O$ vermiculite acquired with a 532 nm laser
- Normalized Raman spectrum of $(Mg,Ca)_{0,7}(Mg,Fe,Al)_6(Al,Si)_8O_{22}(OH)_4 \cdot 8H_2O$ vermiculite in the OH region acquired with a 532 nm laser
- Normalized Raman spectrum of $(Mg,Fe^{2+})_3Si_2O_5(OH)_4$ antigorite acquired with a 532 nm laser
- Normalized Raman spectrum of $(Mg,Fe^{2+})_3Si_2O_5(OH)_4$ antigorite in the OH range acquired with a 532 nm laser
- Normalized Raman spectrum of $Na_{0.3}(Mg,Li)_3Si_4O_{10}(OH)_2$ hectorite SHGa-1 acquired with a 532 nm laser
- Normalized Raman spectrum of $Na_{0.3}(Mg,Li)_3Si_4O_{10}(OH)_2$ hectorite SHGa-1 in the OH range acquired with a 532 nm laser
- Normalized Raman spectrum of $Al_2Si_2O_5(OH)_4$ kaolinite KGa-1 acquired with a 532 nm laser
- Normalized Raman spectrum of $Al_2Si_2O_5(OH)_4$ kaolinite KGa-1 in the OH range acquired with a 532 nm laser
- Normalized Raman spectrum of $(Mg,Fe^{2+})_3Si_2O_5(OH)_4$ lizardite acquired with a 514 nm laser
- Normalized Raman spectrum of $(Mg,Fe^{2+})_3Si_2O_5(OH)_4$ lizardite acquired with a 514 nm laser
- Normalized Raman spectrum of $(Na,Ca)_{0.3}(Al,Mg)_2Si_4O_{10}(OH)_2 \cdot n(H_2O)$ Na-montmorillonite SWy-2 acquired with a 532 nm laser
- Normalized Raman spectrum of $(Na,Ca)_{0.3}(Al,Mg)_2Si_4O_{10}(OH)_2 \cdot n(H_2O)$ Na-montmorillonite SWy-2 in the OH region acquired with a 532 nm laser
- Normalized Raman spectrum of $(Na,Ca)_{0.3}(Al,Mg)_2Si_4O_{10}(OH)_2 \cdot n(H_2O)$ montmorillonite STx-1 acquired with a 532 nm laser
- Normalized Raman spectrum of $(Na,Ca)_{0.3}(Al,Mg)_2Si_4O_{10}(OH)_2 \cdot n(H_2O)$ montmorillonite STx-1 in the OH region acquired with a 532 nm laser
- Normalized Raman spectrum of $KAl_2(AlSi_3O_{10})(OH,F)_2$ muscovite acquired with a 514 nm laser
- Normalized Raman spectrum of $KAl_2(AlSi_3O_{10})(OH,F)_2$ muscovite in the OH range acquired with a 514 nm laser
- Normalized Raman spectrum of $Ca_{0.25}(Mg,Fe)_3((Si,Al)_4O_{10})(OH)_2 \cdot n(H_2O)$ saponite SapCa-2 acquired with a 532 nm laser
- Normalized Raman spectrum of $Ca_{0.25}(Mg,Fe)_3((Si,Al)_4O_{10})(OH)_2 \cdot n(H_2O)$ saponite SapCa-2 in the OH region acquired with a 532 nm laser
- Normalized Raman spectrum of $Mg_3Si_4O_{10}(OH)_2$ talc acquired with a 514 nm laser
- Normalized Raman spectrum of $Mg_3Si_4O_{10}(OH)_2$ talc in the OH region acquired with a 514 nm laser