The thus obtained particles coated with {HEAD ~ the hydroxides} and oxides of {TAIL ~ aluminum} and silicon are then filtered out, washed with water, dried and pulverized 
The thus obtained particles coated with { HEAD ~ the hydroxides } and oxides of { TAIL ~ aluminum } and silicon are then filtered out , washed with water , dried and pulverized
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH