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