Citation: Carballo, Rosa; Covelo, Berta; Fern\'andez-Hermida, Nuria; Garc\'ia-Mart\'inez, Emilia; Lago, Ana B.; V\'azquez, Miguel; V\'azquez-L\'opez, Ezequiel M. (2006). Supramolecular Aggregation of Hexameric Water Clusters into a 2D Water Polymer Containing (H2O)18Holes. Crystal Growth & Design, 6, pp. 629-.