The aluminophosphate molecular sieves exhibit intracrystalline pore volumes (H,O) from
0.04 to 0.35 cm3/g and adsorption pore sizes from 0.3 io 0.8 nm, spanning the entire range
of pore volumes and pore sizes known in zeolites and silica molecular sieves. The uniform
pore dimensions defined by the crystal structure enable the use of these new materials for
size and shape-selective separations and catalysis. Properties of selected AlPO, molecular
sieves are given in Table I.