Abstract: | The title compound, 6C13H24N+·H2Si8O206−·44H2O, belongs to the class of cyclosilicate hydrates, which structurally can be positioned between the zeosils and the clathrate hydrates. [Si8O18(OH)2] cubes carrying six negative charges are located on crystallographic inversion centres and are surrounded by six adamantyltrimethylammonium cations. |