{HEAD ~ Another object} of the invention is to provide {TAIL ~ processes} for synthesizing these novel iron sulfides 
is to provide
{ HEAD ~ Another object } of the invention is to provide { TAIL ~ processes } for synthesizing these novel iron sulfides
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH