“…The general formula of such mixed oxides is ARO 3 (ZnO) m (m = integer; A, R = trivalent ions). Several homologous compounds of oxides of ARO 3 (MO) m (M = Mg, Mn, Fe, Co, Cu, Zn, Cd; A = Sc, Y, In, Ho, Er, Tm, Yb, Lu; R = Al, Fe, Ga) are described [9][10][11][12][13]. Aristotypes for this series of compounds are YbFe 2 O 4 (=FeYbO 3 (FeO) 1 ) [14] and In 2 ZnS 4 (=In 2 S 3 (ZnS) 1 .…”