Molybdenum-rare earth oxide alloy (Mo-REO), also called unusual earth molybdenum, is an alloy of molybdenum as well as rare earth component oxides, which is an oxide dispersion-strengthened alloy, similar to unusual planet tungsten. Frequently used rare planet element oxides are Y2O3, La2O3, CeO2, and also Nd2O3, Sm2O3, Gd2O3, as well