| Abstract: | Near-infrared and midinfrared spectra of a wide range of scapolite compositions were studied to determine the cause of the 2.36-??m features that have been correlated with similar features in the near-IR spectrum of Mars. We attribute the 2.36-??m features to vibrations caused by HCO-3 and HSO-4 in the anion sites of scapolite. The 2.36-??m absorption complex consists of four overlapping bands. The relative intensities of all four bands vary according to the HCO-3/HSO-4 ratio and disordered anion site occupancy. The positional disorder of HCO-3 and HSO4 in the low-symmetry anion site of scapolite gives the 2.36-??m band complex a unique spectral signature not likely to be duplicated in any other mineral. -from Authors |
| Genre: | Article |
| ProdID: | 70015907 |
| Citation Author: | Swayze, G. A.; Clark, R. N. |
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| Citation Issue: | B9 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Search Results Text: | Infrared spectra and crystal chemistry of scapolites: implications for Martian mineralogy; 1990; Article; Journal; Journal of Geophysical Research; Swayze, G. A.; Clark, R. N. |
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| Citation Volume: | 95 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Infrared spectra and crystal chemistry of scapolites: implications for Martian mineralogy; 1990; Article; Journal; Journal of Geophysical Research; Swayze, G. A.; Clark, R. N. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
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