Structure of oxygen clathrate hydrate by neutron powder diffraction |
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| Authors: | J. S. Tse Y. P. Handa C. I. Ratcliffe B. M. Powell |
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| Affiliation: | (1) Division of Chemistry, National Research Council of Canada, K1A 0R9 Ottawa, Ontario, Canada;(2) Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, K0J 1J0 Chalk River, Ontario, Canada |
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| Abstract: | Oxygen hydrate was prepared by reacting oxygen with deuteriated ice at high pressure. Its structure was examined with powder neutron diffraction. It was found to crystallize in the cubic space group witha=17.070(1) Å. The formation of the type II structure rather than type I can be attributed to the larger Langmuir constant of sorption for the oxygen molecules in the 12-hedral cages. The encaged oxygen molecules are orientationally disordered. A comparison of the oxygen thermal parameters in both cages suggests the existence of local potential minima in the 16-hedral cages.Published as NRCC 25940 |
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| Keywords: | Hydrate oxygen structure structure neutron diffraction |
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