In particular, since the valencies of {HEAD ~ zirconium} and hafnium are both constant at 4, the crystal structure of the composite oxide obtained due to the difference between the ion radius of hafnium and that of zirconium is stabilized by adjusting {TAIL ~ the content} of hafnium within the above range 
In particular , since the valencies of { HEAD ~ zirconium } and hafnium are both constant at 4 , the crystal structure of the composite oxide obtained due to the difference between the ion radius of hafnium and that of zirconium is stabilized by adjusting { TAIL ~ the content } of hafnium within the above range
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH