A simple and efficient method is presented here to visualize empty reg
ions-cavities and channels-in zeolites by using computers. With the he
lp of these visualization programs one can learn more about the geomet
ry of the pore structure of these periodic microporous solids. importa
nt physical parameters such as cavity sizes and channel connectivities
can also be determined during the process. By using statistical analy
sis additional information can be obtained about the porosity of these
systems. (C) Elsevier Science Inc. 1997.