The Synthesis of an Extra‐Large‐Pore Zeolite with Double Three‐Ring Building Units and a Low Framework Density

The great wide open: High-throughput techniques have allowed an extra-large-pore zeolite to be obtained that has an 18×12×12 ring pore system. This material (see picture) has the lowest framework density for a silica-based fully-connected zeolite, and is the first example with double three-ring units in its framework.