MO-99 LABELED ZEOLITES - FRAMEWORK MODIFICATIONS

Aluminosilicates, differing in their composition and their crystallini ty, are labeled with radioactive molybdenum. Mo-99 tied to the alumino silicate network decays to Tc-99m. The parameters that determine the s eparation of Tc-99m from Mo-99 are studied in crystalline samples (Mo- exchanged Y zeolite) and in amorphous samples (Mo-exchanged collapsed zeolites and Mo-exchanged pumice stone). The efficiency of the separat ion process is attributed to the environment of molybdenum in the soli d.