was prepared according to the method described in example 1 with 19 6 g al 2 so 4 3 18h 2 o and 25 0 g tmaoh 5h 2 o and 80 0 g h 2 o the resulting tma na aluminate solution which was completely clear was diluted with 30 39 g water this solution was added with strong mixing to 20 09 ludox sm silica sol 30 2 wt sio 2 0 66 wt na 2 o a clear synthesis solution with the molar composition was obtained ______________________________________ tma sub 2 o na sub 2 o al sub 2 o sub 3 sio sub 2 h sub 2 o______________________________________2 35 0 072 1 0 3 4 370______________________________________ the synthesis mixture was heat treated in the same manner as in example 1 after a crystallization time of 40 hours a sample analyzed with dynamic light scattering was found to have a particle size of 70 nm and a geometric standard deviation of 1 17 a powdered sample was obtained by ph adjusting and freeze drying the sol according to the method described in example 1 xrd analysis showed that ca 56 of the crystalline phase was zeolite n y while ca 44 was zeolite n a this example illustrates the preparation of colloidal crystals of zeolite n a and zeolite n y with an average particle size of greater than 200 nm which is not an aim of this invention a clear aluminiumsilicate solution was prepared as described in example 6 and hydrothermally treated as in example 1 after a crystallization time of 20 hours 11 2 g of a 2 0m naoh solution was added to the sol.