New Clathrate Hydrate Structure: High‐Pressure Tetrahydrofuran Hydrate with One Type of Cavity

Water cages: A water framework consisting of uniform space-filling polyhedral cages containing tetrahydrofuran molecules has been detected in a new clathrate hydrate formed under a pressure of 0.8 GPa. Topologically the cage represents a space-filling tetradecahedron with four tetra-, four penta-, and six hexagonal faces (see picture).