SEM, HRTEM, SAED and XRD simulation were used to investigate the crystal structure, channel direction and cell parameters of a high- silica THF-FER zeolite, which was synthesized in the reactant system of tetrahydrofuran (THF)-Na_2O-SiO_2-Al_2O_3-H_20. The results of comparable experiments with siliceous FER zeolite and K-Na-FER zeolite confirm that a platelet-shaped crystallite of THF-FER possesses the same micro-structure and preferential orientation as that of siliceous FER zeolite crystals, belonging to Pnnm space group.

Key words: ZEOLITE, TETRAHYDROFURAN, SEM, XRD, CRYSTAL STRUCTURE, SODIUM OXIDE, SILICON OXIDE, ALUMINIUM, WATER