Mid-infrared (5–100 μm) reflectance spectra and optical constants of ten phyllosilicate minerals |
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Authors: | Timothy D Glotch George R Rossman Oded Aharonson |
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Institution: | aJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91125, USA;bDivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA |
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Abstract: | We have derived the real and imaginary indices of refraction for 10 phyllosilicate minerals—montmorillonite, beidellite, nontronite, hectorite, saponite, illite, illite–smectite (60/40 interlayered) kaolinite, halloysite, and serpentine—from 100–2000 cm−1 (5–100 μm) at 2 cm−1 spectral sampling using classical Lorentz–Lorenz dispersion theory. We present the real and imaginary indices and the oscillator parameters with which they were modeled. Use of these optical constants will aid in the modeling of thermal infrared spectra of planets, asteroids, interplanetary and interstellar dust, and protoplanetary disks around nearby stars. |
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Keywords: | Spectroscopy Infrared observations Mars Asteroids observations Disks Interplanetary dust |
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