Permeability is a crucial aspect of zeolite films, and is a characteristic
that is dependent on the orientation of the individual zeolite crystals tha
t compose the film. In this communication is reported oriented zeolite film
s of FAU structure-type on compositionally different, micrometer-sized EMT
zeolite crystals. The Figure depicts the edge of such a film, and shows tha
t the FAU overgrowth is oriented and highly crystalline.