AlPO,-11, whose structure has not yet been determined, is intermediate in pore size. It
adsorbs molecules as large as cyclohexane (0.60 nm) but not 2,2-dimethylpropane (0.62 nm).
This pore size is similar to that of silicaliteZ and indicates that the AIP04-l 1 structure contains voids bounded by 10-rings or puckered 12-rings.