{TAIL ~ The additive} is either an ionic additive or an amine additive which forms {HEAD ~ an ionic ammonium type salt} in the acidic precursor solution 
{ TAIL ~ The additive } is either an ionic additive or an amine additive which forms { HEAD ~ an ionic ammonium type salt } in the acidic precursor solution
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH