You are seeing a free-to-access but limited selection of the activity Altmetric has collected about this research output.
Click here to find out more.
Mendeley readers
Attention Score in Context
| Title |
Transformations in methane hydrates
|
|---|---|
| Published in |
Proceedings of the National Academy of Sciences of the United States of America, November 2000
|
| DOI | 10.1073/pnas.250466497 |
| Pubmed ID | |
| Authors |
I-Ming Chou, Anurag Sharma, Robert C. Burruss, Jinfu Shu, Ho-kwang Mao, Russell J. Hemley, Alexander F. Goncharov, Laura A. Stern, Stephen H. Kirby |
| Abstract |
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) A and volume V = 5051.3(13) A(3); structure H at 600 MPa has a hexagonal unit cell of a = 11.980(2) A, c = 9.992(3) A, and V = 1241.9(5) A(3). 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. |
Mendeley readers
The data shown below were compiled from readership statistics for 123 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 2 | 2% |
| Russia | 1 | <1% |
| Canada | 1 | <1% |
| Unknown | 119 | 97% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 33 | 27% |
| Researcher | 22 | 18% |
| Student > Master | 11 | 9% |
| Professor > Associate Professor | 9 | 7% |
| Student > Doctoral Student | 5 | 4% |
| Other | 14 | 11% |
| Unknown | 29 | 24% |
| Readers by discipline | Count | As % |
|---|---|---|
| Earth and Planetary Sciences | 20 | 16% |
| Engineering | 17 | 14% |
| Chemistry | 16 | 13% |
| Physics and Astronomy | 9 | 7% |
| Chemical Engineering | 7 | 6% |
| Other | 17 | 14% |
| Unknown | 37 | 30% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 January 2007.
All research outputs
#8,219,054
of 24,625,114 outputs
Outputs from Proceedings of the National Academy of Sciences of the United States of America
#64,491
of 101,438 outputs
Outputs of similar age
#27,498
of 118,278 outputs
Outputs of similar age from Proceedings of the National Academy of Sciences of the United States of America
#241
of 456 outputs
Altmetric has tracked 24,625,114 research outputs across all sources so far. This one is in the 43rd percentile – i.e., 43% of other outputs scored the same or lower than it.
So far Altmetric has tracked 101,438 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 38.8. This one is in the 15th percentile – i.e., 15% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 118,278 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 16th percentile – i.e., 16% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 456 others from the same source and published within six weeks on either side of this one. This one is in the 7th percentile – i.e., 7% of its contemporaries scored the same or lower than it.