227 research outputs found
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From stardust to planets: FT-IR spectroscopy of fine-grained planetary materials
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Infrared spectroscopy of circumstellar dust: signs of differentiated materials?
Mid-infrared absorption spectra of powdered achondrites are compared with the astronomical spectra of dust around young, evolving stars, to find evidence (or not) of dust formed in collisional cascades of material from planetesimals
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Mid-infrared spectroscopy of matrix materials from chondrites: first heating experiments
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FT-IR microanalysis of mineral separates from primitive meteorites: techniques, problems and solutions
From the Introduction: We compared several methods of infrared micro spectroscopy using an FT-IR microscope and workbench. This is part of a project to assemble a database of infrared and optical spectra from mineral separates from meteorites, for comparison with astronomical data. Since we usually have to work with small amounts of material (original grain sizes often <50 m), special sample preparation and analytical procedures
have to be applied
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Infrared spectroscopy of extraterrestrial material: comparison with astronomical spectra of dust
Infrared spectra of components (CAI, matrix etc.) from type 3 carbonacous chondrites (Allende, Ornans, Vigarano) are compared with infrared spectra from astronomical objects (comets, zodiacal light, circumstellar disks and others)
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Dust from collisions: mid-infrared absorbance spectroscopy of Martian meteorites
Mid-infrared transmission/absorbance spectra of a representative range of martian meteorites are presented. The data is used for mineralogical bulk studies, but also for the comparison with astronomical dust spectra
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FT-IR spectroscopy of CAI and chondrules in primitive chondrites: techniques and first results
From the Introduction: Here we present preliminary mid-infrared spectra of CAI, chondrules and matrix from the CV3.2 carbonaceous chondrite Allende. This is part of our ongoing project to compile a database of infrared and optical spectra of minerals and components of primitive meteorites. These spectra should allow a better comparison with spectra from astronomical sources e.g. from dust
and molecular clouds or young solar systems
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FT-IR micro-spectroscopy of fine-grained planetary materials: further results
We present data from FT-IR microspectroscopy of olivines in a thin section of the LL3.6 ordinary chondrite Parnallee. Results are discussed and compared with other methods of FT-IR microspectroscopy
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Spectroscopy of Stardust from 200nm to 16┬╡M (with a gap in the middle)
UV/Vis and IR spectroscopy are complementary, non-destructive techniques that can be used to identify the presence of a range of organic and inorganic, hydrated and anhydrous minerals within micron-sized grains. We look forward to applying these techniques to the Stardust materials
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