Infrared diffuse reflectances (2.5-25 microns) of some meteorites

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Spectroscopy, Diffuse Radiation, Infrared Spectra, Meteoritic Composition, Reflected Waves, Spectral Reflectance, Absorption Spectra, Carbonaceous Chondrites, Fourier Transformation, Mineralogy, Murchison Meteorite, Meteorites, Infrared, Wavelengths, Reflectance, Carbonaceous Chondrites, Spectrophotometry, Spectra, Absorption, Mineralogy, Stony Meteorites, Cm2 Chondrites, Cv3 Chondrites, Samples, Meteorite, Laboratory Studies, Hydration, Carbonates, Enstatites, Achondrites, Norton County, Allen

Scientific paper

Emissionless infrared diffuse reflectances of several meteorites were measured using a Fourier transform infrared spectrophotometer to identify asteroidal surface materials. It is noted that C3 carbonaceous chondrite materials may be distinguished from C3 materials by the depth of their hydration bands around 3 and 6 microns. Acid dissolution experiments suggest that the 6.8-micron band in the spectra of the Murchison (C2) meteorite is due to carbonates. The Norton County enstatite meteorite shows absorption bands around 10 microns which are due to the presence of pyroxene, and which are not found in the Mundrabilla iron meteorite.

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