Apart from the investigation of carbon nano-tubes with the Raman spectroscopy an emphasis at present is the study of inclusion connections, with which single molecules are stored in cages of water molecules bound by hydrogen bond connections. A well-known system from this row is the methanehydrate clathrate, also known as methane ice. A Clathrate with which a small ring molecule (tetrahydrofurane – THF) in a hydrate cage is imprisoned is examined intensively at present. Here, the interaction between excitations of the THF molecule with the lattice vibrations of the hydrate cage is of interest, which apparently induces a structural phase transition at low temperatures. An important point is the question of structural stability, since it is known, that these Methanclathrates form powerful stores at the edge of the continental shelf. Apart from the mechanical characteristics of these Clathrates also their use as energy carriers or as energy storages is of current interest.