In particular, since {HEAD ~ the valencies} of zirconium and {TAIL ~ 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 the content of hafnium within the above range 
of
In particular , since { HEAD ~ the valencies } of zirconium and { TAIL ~ 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 the content of hafnium within the above range
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH