High-pressure transitions in methane hydrate

被引：32

作者：

Loveday, JS

Nelmes, RJ

Guthrie, M

机构：

[1] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 350卷 / 5-6期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0009-2614(01)01328-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three recent studies of the high-pressure transformations of methane hydrate [Chem. Phys. Lett, 325 (2000) 490; Proc. Natl. Acad. Sci. 97 (2000) 13484; Nature 410 (2001) 661] have reported apparently different behaviours. Detailed comparison of our X-ray and neutron diffraction data with those obtained in earlier work shows that there is in fact consistent behaviour on isothermal compression at room temperature with a transition from the clathrate I structure hydrate to a hexagonal hydrate with an unknown structure at similar to0.9 GPa. (C) 2001 Published by Elsevier Science B.V.

引用

收藏

页码：459 / 465

页数：7

相关论文

共 24 条

[11] Methane hydrate, amoeba or a sponge made of water molecules [J].

Hirai, H ;

Hasegawa, M ;

Yagi, T ;

Yamamoto, Y ;

Nagashima, K ;

Sakashita, M ;

Aoki, K ;

Kikegawa, T .

CHEMICAL PHYSICS LETTERS, 2000, 325 (5-6) :490-498

[12] Methane hydrate and free gas on the blake ridge from vertical seismic profiling [J].

Holbrook, WS ;

Hoskins, H ;

Wood, WT ;

Stephen, RA ;

Lizarralde, D .

SCIENCE, 1996, 273 (5283) :1840-1843

[13] The pressure dependence of hydrophobic interactions is consistent with the observed pressure denaturation of proteins [J].

Hummer, G ;

Garde, S ;

García, AE ;

Paulaitis, ME ;

Pratt, LR .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1998, 95 (04) :1552-1555

[14]

*ISIS 97 RUTH APPL, 1997, RALTR97050 ISIS 97 R

[15] Transition from cage clathrate to filled ice: The structure of methane hydrate III [J].

Loveday, JS ;

Nelmes, RJ ;

Guthrie, M ;

Klug, DD ;

Tse, JS .

PHYSICAL REVIEW LETTERS, 2001, 87 (21) :215501-1

[16] Stable methane hydrate above 2 GPa and the source of Titan's atmospheric methane [J].

Loveday, JS ;

Nelmes, RJ ;

Guthrie, M ;

Belmonte, SA ;

Allan, DR ;

Klug, DD ;

Tse, JS ;

Handa, YP .

NATURE, 2001, 410 (6829) :661-663

[17] CLATHRATE AND AMMONIA HYDRATES AT HIGH-PRESSURE - APPLICATION TO THE ORIGIN OF METHANE ON TITAN [J].

LUNINE, JI ;

STEVENSON, DJ .

ICARUS, 1987, 70 (01) :61-77

[18] HIGH-PRESSURE POWDER DIFFRACTION ON SYNCHROTRON SOURCES [J].

NELMES, RJ ;

MCMAHON, MI .

JOURNAL OF SYNCHROTRON RADIATION, 1994, 1 :69-73

[19]

NELMES RJ, 1993, T AM CRYSTALLOGR ASS, V29, P19

[20] UNIT-CELL REFINEMENT FROM POWDER DIFFRACTION SCANS [J].

PAWLEY, GS .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1981, 14 (DEC) :357-361