More specifically, among {HEAD ~ such oxide materials} are Dy2O3, Er2O3, Eu2O3, Gd2O3, Ho2O3, In2O3, La2O3, Lu2O3, β Mn2O3, Nd2O3, Pr2O3, {TAIL ~ Sc2O3}, Sm2O3, Tb2O3, Tl2O3, Tm2O3, Y2O3 and Yb2O3 
are
More specifically , among { HEAD ~ such oxide materials } are Dy2O3 , Er2O3 , Eu2O3 , Gd2O3 , Ho2O3 , In2O3 , La2O3 , Lu2O3 , β Mn2O3 , Nd2O3 , Pr2O3 , { TAIL ~ Sc2O3 } , Sm2O3 , Tb2O3 , Tl2O3 , Tm2O3 , Y2O3 and Yb2O3
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH