Anomalous increase in specific volume upon crystallization of some alloys in the zirconia-yttria-erbia system

Such a phenomenon should be take place upon oxides crystallization of rare-earth elements which have physicochemical properties and electron structure similar to those of Y2O3, namely of heavy lanthanides oxides Ho2O3, Tm2O3, and Yb2O3; upon the crystallization of their alloys with each other and with Er2O3 and Y2O3.