Thermal stabilization of extraframework Cs+ in zeolite 13X

A Six-Year Hydration Evaluation of Cs-Bearing Materials at Room Temperature and 55% Relative Humidity Simulating Radioactive Waste with Different Crystallinities

“…The specific surface areas (S BET ) of the prepared powders—which are listed from Cs-C2 to Cs-C36—are 1.17 ± 0.02; 1.41 ± 0.03; 1.78 ± 0.04; 2.31 ± 0.09; 1.80 ± 0.05; 1.19 ± 0.02; and 1.83 ± 0.09 m 2 /g. These values are characteristic of non-porous materials, as stated by Park et al [ 38 ] when commenting on a similar surface area (2.37 m 2 /g), which was referred to a zeolite 13X that had been exchanged with Cs and treated at 900 °C for 2 h. There was no correlation found between the heating duration and S BET , and the slight difference in the surface area of the powders could have simply resulted from the micronization process (see Section 4.2 ). On the other hand, considering the particles as perfect spheres with mean diameters between 1 and 2 μm, and taking into account the measured densities, the calculated surface areas would range from 1.03 to 2.15 m 2 /g.…”