IM-16: A new microporous germanosilicate with a novel framework topology containing d4r and mtw composite building units

The synthesis and the structure of IM-16 a new germanosilicate with a novel zeolitic topology prepared hydrothermally with the ionic liquid 3-ethyl-1-methyl-3H-imidazol-1-ium as the organic structure-directing agent are reported. The structure of calcined and partially rehydrated IM-16 of chemical formula |(H2O)0.16|[Si3.47Ge2.53O12] was solved from powder XRD data in space group Cmcm with a=15.0861(2) Å, b=17.7719(3) Å, c=19.9764(3) Å, V=5355.84(12) Å3 (Z=16). This new zeolite framework type contains 10-MRs channels and may be described from the d4r and mtw composite building units.