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Stable Low-Pressure Hydrogen Clusters Stored in a Binary Clathrate Hydrate

Science  15 Oct 2004:
Vol. 306, Issue 5695, pp. 469-471
DOI: 10.1126/science.1102076

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Abstract

Thermodynamic, x-ray diffraction, and Raman and nuclear magnetic resonance spectroscopy measurements show that clusters of H2 can be stabilized and stored at low pressures in a sII binary clathrate hydrate. Clusters of H2 molecules occupy small water cages, whereas large water cages are singly occupied by tetrahydrofuran. The presence of this second guest component stabilizes the clathrate at pressures of 5 megapascals at 279.6 kelvin, versus 300 megapascals at 280 kelvin for pure H2 hydrate.

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