Erbium: pink powder. Easy to absorb moisture and carbon dioxide. Converted to hexagonal crystal is heated to 1300 ℃. Not melted. Solubility: soluble inorganic acids, insoluble in water. Relative density: 8.64. Irritation. Melting point: 2387 ℃ Boiling point: 3000 ℃ is mainly used as yttrium iron garnet additives and nuclear reactor control materials used in the manufacture of special glass and absorb infrared light-emitting glass, also used glass coloring agent. After the nitric acid or sulfuric acid erbium doped with alkali solution reaction, separation, burning derived. Only Er2O3 a stable compound. Body-centered cubic and monoclinic powder two structures. Er2O3 magnetic moment is large, the 9.5M.B .. Other properties and was prepared as lanthanides. Making pink glass.