Citation: Yeom, Y.H.; Kim, Y.; Seff, K. (1999). Crystal structure of Pb(2+)44 Pb(4+)5 Tl(+)18 O(2-)17 Si100 Al92 O384 zeolite X exchanged with Pb(2+) and Tl(+) and dehydrated, containing Pb4 O4 (Pb(2+), Pb(4+) mixed)4 clusters. Microporous and Mesoporous Materials, 28, pp. 103-112.