Abstract

Clathrate hydrates have cage-like host structures that enclose the guest molecules. Hydrogen sulfide hydrate has a lower synthesis pressure than ordinary hydrocarbon hydrates. Since hydrogen sulfide is one of the polar molecules like water, some interactions between hydrogen sulfide and water stabilize the clathrate structure. We investigated the hydrogen bonding network in hydrogen sulfide hydrate using powder neutron diffraction. The scattering length density distribution corresponding to hydrogen atoms of water molecules showed a spread from the straight line between oxygen atoms, and the distribution changed with temperature. We revealed that the hydrogen bonding network changed with temperature.

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