Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems
There 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 t...
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ftpubmed:oai:pubmedcentral.nih.gov:3443173 2023-05-15T17:12:01+02:00 Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems Shin, Kyuchul Kumar, Rajnish Udachin, Konstantin A. Alavi, Saman Ripmeester, John A. 2012-09-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443173 http://www.ncbi.nlm.nih.gov/pubmed/22908239 https://doi.org/10.1073/pnas.1205820109 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443173 http://www.ncbi.nlm.nih.gov/pubmed/22908239 http://dx.doi.org/10.1073/pnas.1205820109 Physical Sciences Text 2012 ftpubmed https://doi.org/10.1073/pnas.1205820109 2013-09-04T12:57:13Z There 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. Text Methane hydrate PubMed Central (PMC) Proceedings of the National Academy of Sciences 109 37 14785 14790 |
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Physical Sciences Shin, Kyuchul Kumar, Rajnish Udachin, Konstantin A. Alavi, Saman Ripmeester, John A. Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems |
topic_facet |
Physical Sciences |
description |
There 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. |
format |
Text |
author |
Shin, Kyuchul Kumar, Rajnish Udachin, Konstantin A. Alavi, Saman Ripmeester, John A. |
author_facet |
Shin, Kyuchul Kumar, Rajnish Udachin, Konstantin A. Alavi, Saman Ripmeester, John A. |
author_sort |
Shin, Kyuchul |
title |
Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems |
title_short |
Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems |
title_full |
Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems |
title_fullStr |
Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems |
title_full_unstemmed |
Ammonia clathrate hydrates as new solid phases for Titan, Enceladus, and other planetary systems |
title_sort |
ammonia clathrate hydrates as new solid phases for titan, enceladus, and other planetary systems |
publisher |
National Academy of Sciences |
publishDate |
2012 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443173 http://www.ncbi.nlm.nih.gov/pubmed/22908239 https://doi.org/10.1073/pnas.1205820109 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443173 http://www.ncbi.nlm.nih.gov/pubmed/22908239 http://dx.doi.org/10.1073/pnas.1205820109 |
op_doi |
https://doi.org/10.1073/pnas.1205820109 |
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Proceedings of the National Academy of Sciences |
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109 |
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37 |
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14785 |
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14790 |
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1766068774298976256 |