Synthesis of a novel gallosilicate with the ferrierite structure

Abstract
Aluminium-free (Si, Ga)-ferrierite with Si/Ga = 6.6 has been prepared by direct synthesis and its orthorhombic unit cell parameters are a= 19.01(1), b= 14.15(1), and c= 7.481(3)Å, the unit cell volume being 0.55% larger than for (Si, Al)-ferrierite; solid-sate n.m.r. spectroscopy shows that pyrrolidine, the template molecule, is essentially intact in the channels of the new material.

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