“…The high cation exchange capacity has been also patented for sorbent applications of radioactive Cs and Sr isotopes [12]. Mineral zorite and related ETS-4 structures have attracted significant interest due to their versatile ion exchange properties including elements as Co, Cd, Hg [13], Tl [14], Pb [15], Cs [16], Ca and Ba [17,18]. However, the detailed structural studies of all these works are missing or they are limited to isolated single crystals of the mineral zorite.…”