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    Quantitative organic and light-element analysis of comet 81P/Wild 2 particles using C-, N-, and O-μ-XANES

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    Author
    Cody, G. D.
    Ade, H.
    Alexander, C. M. O'D.
    Araki, T.
    Butterworth, A.
    Fleckenstein, H.
    Flynn, G.
    Gilles, M. K.
    Jacobsen, C.
    Kilcoyne, A. L. D.
    Messenger, K.
    Sandford, S. A.
    Tyliszczak, T.
    Westphal, A. J.
    Wirick, S.
    Yabuta, H.
    Show allShow less
    Issue Date
    2008-01-01
    Keywords
    Stardust Mission
    chemical composition of comets
    organic matter
    Xanes
    
    Metadata
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    Citation
    Cody, G. D., Ade, H., Alexander, C. M. O'D., Araki, T., Butterworth, A., Fleckenstein, H., ... & Yabuta, H. (2008). Quantitative organic and light‐element analysis of comet 81P/Wild 2 particles using C‐, N‐, and O‐μ‐XANES. Meteoritics & Planetary Science, 43(1‐2), 353-365.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656399
    DOI
    10.1111/j.1945-5100.2008.tb00627.x
    Additional Links
    https://meteoritical.org/
    Abstract
    Synchrotron-based soft X-ray micro-analysis was performed on particles extracted from the Stardust aerogel collector in order to obtain detailed organic functional group information on any organic solids captured as part of the Principal Examination suite of analyses for samples from comet 81P/Wild 2. It is observed that cometary organic carbon captured in aerogel is present in a number of different manifestations and often intimately associated with silicates. Carbon X-ray absorption near edge structure (XANES) spectra reveal considerable chemical complexity in all of the organic particles studied so far. Universally, the comet 81P/Wild 2 organic particles contain low concentrations of aromatic and/or olefinic carbon relative to aliphatic and heteroatom-containing functional groups, e.g., amide, carboxyl, and alcohol/ethers. N-XANES confirms the presence and assignments of these functional groups. In general, the XANES data record considerable chemical complexity across the range of organic samples currently analyzed. The atomic ratios, N/C and O/C, derived from XANES data reveal a wide range in heteroatom content; in all cases these elemental ratios are higher than that of primitive meteoritic organic matter. The wide range in chemistry, both in elemental abundances and specific organic functional groups, suggests that the comet 81P/Wild 2 organic solids may have multiple origins.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2008.tb00627.x
    Scopus Count
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    Meteoritics & Planetary Science, Volume 43, Number 1-2 (2008)

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