Guest disorder and high pressure behavior of argon hydrates

L. Yang; C. A. Tulk; D. D. Klug; B. C. Chakoumakos; L. Ehm; J. J. Molaison; J. B. Parise; J. M. Simonson

doi:10.1016/j.cplett.2009.12.024

Guest disorder and high pressure behavior of argon hydrates

L. Yang
, C. A. Tulk
, D. D. Klug
, B. C. Chakoumakos
, L. Ehm
, J. J. Molaison
, J. B. Parise
, J. M. Simonson

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The structure of argon hydrate was studied at ambient pressure and low temperature, and between 1.7 and 4.2 GPa at 295 K. This analysis produced a single Ar guest atom, positionally disordered off-center in the large cages of sII. Above 1.7 GPa Ar clathrate transformed to a mixture of a body-centered orthorhombic filled-ice phase, which can be viewed as a polytype of ice-Ih, and high pressure forms of pure ice. The guest disorder is further substantiated by analysis of the guest to host ratio in this high pressure filled-ice structure. The bulk modulus of Ar filled-ice found to be 11.7 ± 0.4 GPa.

Original language	English
Pages (from-to)	104-109
Number of pages	6
Journal	Chemical Physics Letters
Volume	485
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2009.12.024
State	Published - Jan 18 2010

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10.1016/j.cplett.2009.12.024

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title = "Guest disorder and high pressure behavior of argon hydrates",

abstract = "The structure of argon hydrate was studied at ambient pressure and low temperature, and between 1.7 and 4.2 GPa at 295 K. This analysis produced a single Ar guest atom, positionally disordered off-center in the large cages of sII. Above 1.7 GPa Ar clathrate transformed to a mixture of a body-centered orthorhombic filled-ice phase, which can be viewed as a polytype of ice-Ih, and high pressure forms of pure ice. The guest disorder is further substantiated by analysis of the guest to host ratio in this high pressure filled-ice structure. The bulk modulus of Ar filled-ice found to be 11.7 ± 0.4 GPa.",

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T1 - Guest disorder and high pressure behavior of argon hydrates

AU - Yang, L.

AU - Tulk, C. A.

AU - Klug, D. D.

AU - Chakoumakos, B. C.

AU - Ehm, L.

AU - Molaison, J. J.

AU - Parise, J. B.

AU - Simonson, J. M.

PY - 2010/1/18

Y1 - 2010/1/18

N2 - The structure of argon hydrate was studied at ambient pressure and low temperature, and between 1.7 and 4.2 GPa at 295 K. This analysis produced a single Ar guest atom, positionally disordered off-center in the large cages of sII. Above 1.7 GPa Ar clathrate transformed to a mixture of a body-centered orthorhombic filled-ice phase, which can be viewed as a polytype of ice-Ih, and high pressure forms of pure ice. The guest disorder is further substantiated by analysis of the guest to host ratio in this high pressure filled-ice structure. The bulk modulus of Ar filled-ice found to be 11.7 ± 0.4 GPa.

AB - The structure of argon hydrate was studied at ambient pressure and low temperature, and between 1.7 and 4.2 GPa at 295 K. This analysis produced a single Ar guest atom, positionally disordered off-center in the large cages of sII. Above 1.7 GPa Ar clathrate transformed to a mixture of a body-centered orthorhombic filled-ice phase, which can be viewed as a polytype of ice-Ih, and high pressure forms of pure ice. The guest disorder is further substantiated by analysis of the guest to host ratio in this high pressure filled-ice structure. The bulk modulus of Ar filled-ice found to be 11.7 ± 0.4 GPa.

UR - https://www.scopus.com/pages/publications/73149112437

U2 - 10.1016/j.cplett.2009.12.024

DO - 10.1016/j.cplett.2009.12.024

M3 - Article

AN - SCOPUS:73149112437

SN - 0009-2614

VL - 485

SP - 104

EP - 109

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Guest disorder and high pressure behavior of argon hydrates

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