Disclosed are {HEAD ~ a class} of {TAIL ~ compositions}, and methods of preparing them, which compositions are comprised of inorganic oxides and organic bases 
of
Disclosed are { HEAD ~ a class } of { TAIL ~ compositions } , and methods of preparing them , which compositions are comprised of inorganic oxides and organic bases
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH