wherein x is less than or equal to 0.02, M is said initial lattice metal and n is the valance of {HEAD ~ M}, said {TAIL ~ crystalline composition} having a total cation exchange capacity of less than about 0.7 meq/gram, which comprises the steps of 
wherein x is less than or equal to 0.02 , M is said initial lattice metal and n is the valance of { HEAD ~ M } , said { TAIL ~ crystalline composition } having a total cation exchange capacity of less than about 0.7 meq / gram , which comprises the steps of
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH