Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems

Download
  1. Get@NRC: Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1073/pnas.1205820109
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleProceedings of the National Academy of Sciences of the United States of America
ISSN0027-8424
1091-6490
Volume109
Issue37
Pages1478514790; # of pages: 6
Subjectice; single crystal X-ray diffraction; hydrogen bonding; hydrate inhibitors; ethane
AbstractThere is interest in the role of ammonia on Saturn’s moons Titan and Enceladus as the presence of water, methane, and ammonia under temperature and pressure conditions of the surface and interior make these moons rich environments for the study of phases formed by these materials. Ammonia is known to form solid hemi-, mono-, and dihydrate crystal phases under conditions consistent with the surface of Titan and Enceladus, but has also been assigned a role as water-ice antifreeze and methane hydrate inhibitor which is thought to contribute to the outgassing of methane clathrate hydrates into these moons’ atmospheres. Here we show, through direct synthesis from solution and vapor deposition experiments under conditions consistent with extraterrestrial planetary atmospheres, that ammonia forms clathrate hydrates and participates synergistically in clathrate hydrate formation in the presence of methane gas at low temperatures. The binary structure II tetrahydrofuran + ammonia, structure I ammonia, and binary structure I ammonia + methane clathrate hydrate phases synthesized have been characterized by X-ray diffraction, molecular dynamics simulation, and Raman spectroscopy methods.
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; Security and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21269080
Export citationExport as RIS
Report a correctionReport a correction
Record identifierfb8d6ead-9110-4ad2-847e-1292ac2db1d3
Record created2013-12-05
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: