In contrast to this, γ {HEAD ~ alumina} having a cubic system spinel type crystal structure has {TAIL ~ many lattice defects} in which oxygen atoms lack because, e.g., the crystal structure is unnatural 
has
In contrast to this , γ { HEAD ~ alumina } having a cubic system spinel type crystal structure has { TAIL ~ many lattice defects } in which oxygen atoms lack because , e.g. , the crystal structure is unnatural
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH