There is then a further heating and cooling stage in an oxidising atmosphere which acts to remove {HEAD ~ intercalated carbon moieties} from {TAIL ~ the metallic feature} 
There is then a further heating and cooling stage in an oxidising atmosphere which acts to remove { HEAD ~ intercalated carbon moieties } from { TAIL ~ the metallic feature }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL