A Layer Silicate: Synthesis and Structure of the Zeolite Precursor RUB-15—[N(CH3)4]8[Si24O52(OH)4]·20 H2O†
H. G. acknowledges financial support for parts of the program by the Deutsche Forschungsgemeinschaft (Gi 139-13/1). J. R. thanks the Spanish Dirección General de Investigación Cientifica y Técnica (DGICYT) for financing the cooperation (accion intergrada hispano-alemana).
Graphical Abstract
The missing link in the series clathrate hydrates, group silicate hydrates—layer silicate hydrates—porous framework silicas is provided by RUB-15, a new layer silicate hydrate with a three-dimensional bonding network composed of layerlike silicate ions and water molecules linked by hydrogen bonds. A section of the structure of is shown on the right. RUB-15 further illustrates the close relationship between crystalline compounds of water, silica, and mixtures thereof.