Erbium oxide catalyst

Ytterbium Oxide, white amorphous powder, slightly hygroscopic. Relative density 9.17, melting point 2346℃. Insoluble in water and cold acids, but soluble in hot dilute acids.  

Erbium oxide, is a pink powder that readily absorbs moisture and carbon dioxide. It transforms into hexagonal crystals when heated to 300 ° C. Not receptive. Slightly soluble in inorganic acids, insoluble in water. Relative density 8.64. It's stimulating.  

Terbium dioxide,Tb4O7, compound with a dark brown hexagonal calcium fluoride structure and is a strong oxidizing agent.

Erbium oxide, pink powder with the chemical formula Er2O3. It readily absorbs moisture and carbon dioxide. Slightly soluble in inorganic acids, insoluble in water.