Fig. 2 (IMAGE) Osaka University Caption Schematic illustration of the crystal lattice of a semiclathrate hydrate. Black balls represent oxygen atoms in the water molecules, which are connected through hydrogen bonds (black lines). Inside the cage are the cations and anions (bromide ions) and the cage structure is formed by water molecules. Credit Takeshi Sugahara Usage Restrictions Only noncommercial uses of the work are permitted. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.