Abstract
Crystalline aluminosilicates with low refractive index were synthesized by diminishing the aluminum content in A type zeolite composition. Concentration of Na2O in the Al-solution played an important role in the crystallization of the zeolites with low index of refraction. The linear relationship between the indices of refraction and the Al/Si molar ratios of synthesized crystalline aluminosilicates was obtained as: n=1.419+0.0457 (Al/Si), wheren is refractive index. The lowering in refractive index led to linear decrease of the turbidity of water-ethanol suspension containing the zeolite. Electron microscopy and selected area electron diffraction patterns showed cubic structure with a0=12.21 Å at the Al/Si ratio=0.7. Particle diameter of the zeolites was in the range of 0.6 to 0.9μm on the average. The values of cation exchange capacity slightly smaller than that of A type zeolite were obtained.
