STXM search for carbonate in samples of Comet 81P/Wild 2

Details STXM search for carbonate in samples of Comet 81P/Wild 2 STXM search for carbonate in samples of Comet 81P/Wild 2

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jphcs.186a2085f&link_type=abstract

Journal of Physics: Conference Series, Volume 186, Issue 1, pp. 012085 (2009).

Physics

1

Scientific paper

We employed a Scanning Transmission X-ray Microscope (STXM) to search for carbonate in samples of dust from Comet 81P/Wild 2 collected by NASA's Stardust spacecraft. Although carbonate was not expected in Wild 2 because it generally forms by aqueous processing, which is not thought to occur on comets, we identified two sub-micron carbonate grains in Wild 2 samples. The results demonstrate the effectiveness of the STXM as a search and identification tool for rare minerals that exhibit distinctive X-ray Absorption Near-Edge Structure (XANES) spectra.

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