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Infrared spectra and crystal chemistry of scapolites: implications for Martian mineralogy

Journal of Geophysical Research
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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

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Infrared spectra and crystal chemistry of scapolites: implications for Martian mineralogy
Series title Journal of Geophysical Research
Volume 95
Issue B9
Year Published 1990
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Geophysical Research