Transformations in methane hydrates
Detailed study of pure methane hydrate in a diamond cell with in situ optical, Raman, and x-ray microprobe techniques reveals two previously unknown structures, structure II and structure H, at high pressures. The structure II methane hydrate at 250 MPa has a cubic unit cell of a = 17.158(2) Å and v...
Main Authors: | , , , , , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
The National Academy of Sciences
2000
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC17601 http://www.ncbi.nlm.nih.gov/pubmed/11087836 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:17601 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:17601 2023-05-15T17:11:24+02:00 Transformations in methane hydrates Chou, I-Ming Sharma, Anurag Burruss, Robert C. Shu, Jinfu Mao, Ho-kwang Hemley, Russell J. Goncharov, Alexander F. Stern, Laura A. Kirby, Stephen H. 2000-12-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC17601 http://www.ncbi.nlm.nih.gov/pubmed/11087836 en eng The National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC17601 http://www.ncbi.nlm.nih.gov/pubmed/11087836 Copyright © 2000, The National Academy of Sciences Physical Sciences Text 2000 ftpubmed 2013-08-29T06:49:39Z Detailed study of pure methane hydrate in a diamond cell with in situ optical, Raman, and x-ray microprobe techniques reveals two previously unknown structures, structure II and structure H, at high pressures. The structure II methane hydrate at 250 MPa has a cubic unit cell of a = 17.158(2) Å and volume V = 5051.3(13) Å3; structure H at 600 MPa has a hexagonal unit cell of a = 11.980(2) Å, c = 9.992(3) Å, and V = 1241.9(5) Å3. The compositions of these two investigated phases are still not known. With the effects of pressure and the presence of other gases in the structure, the structure II phase is likely to dominate over the known structure I methane hydrate within deep hydrate-bearing sediments underlying continental margins. Text Methane hydrate PubMed Central (PMC) |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Physical Sciences |
spellingShingle |
Physical Sciences Chou, I-Ming Sharma, Anurag Burruss, Robert C. Shu, Jinfu Mao, Ho-kwang Hemley, Russell J. Goncharov, Alexander F. Stern, Laura A. Kirby, Stephen H. Transformations in methane hydrates |
topic_facet |
Physical Sciences |
description |
Detailed study of pure methane hydrate in a diamond cell with in situ optical, Raman, and x-ray microprobe techniques reveals two previously unknown structures, structure II and structure H, at high pressures. The structure II methane hydrate at 250 MPa has a cubic unit cell of a = 17.158(2) Å and volume V = 5051.3(13) Å3; structure H at 600 MPa has a hexagonal unit cell of a = 11.980(2) Å, c = 9.992(3) Å, and V = 1241.9(5) Å3. The compositions of these two investigated phases are still not known. With the effects of pressure and the presence of other gases in the structure, the structure II phase is likely to dominate over the known structure I methane hydrate within deep hydrate-bearing sediments underlying continental margins. |
format |
Text |
author |
Chou, I-Ming Sharma, Anurag Burruss, Robert C. Shu, Jinfu Mao, Ho-kwang Hemley, Russell J. Goncharov, Alexander F. Stern, Laura A. Kirby, Stephen H. |
author_facet |
Chou, I-Ming Sharma, Anurag Burruss, Robert C. Shu, Jinfu Mao, Ho-kwang Hemley, Russell J. Goncharov, Alexander F. Stern, Laura A. Kirby, Stephen H. |
author_sort |
Chou, I-Ming |
title |
Transformations in methane hydrates |
title_short |
Transformations in methane hydrates |
title_full |
Transformations in methane hydrates |
title_fullStr |
Transformations in methane hydrates |
title_full_unstemmed |
Transformations in methane hydrates |
title_sort |
transformations in methane hydrates |
publisher |
The National Academy of Sciences |
publishDate |
2000 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC17601 http://www.ncbi.nlm.nih.gov/pubmed/11087836 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC17601 http://www.ncbi.nlm.nih.gov/pubmed/11087836 |
op_rights |
Copyright © 2000, The National Academy of Sciences |
_version_ |
1766068202529357824 |