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. 2001 Nov 19;87(21):215501.
doi: 10.1103/PhysRevLett.87.215501. Epub 2001 Oct 31.

Transition from cage clathrate to filled ice: the structure of methane hydrate III

J S Loveday  1 , R J Nelmes, M Guthrie, D D Klug, J S Tse
Affiliations

Transition from cage clathrate to filled ice: the structure of methane hydrate III

J S Loveday et al. Phys Rev Lett. .

Abstract

The structure of a new methane hydrate has been solved at 3 GPa from neutron and x-ray powder diffraction data. It is a dihydrate in which a 3D H-bonded network of water molecules forms channels surrounding the methane molecules. The network is closely related to that of ice-Ih and the methane-water system appears to be the first in which a cage clathrate hydrate is transformed into an ice-related hydrate (a "filled ice").

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