Molecular formula: Er2O3
Appearance characteristics: pink powder, slightly soluble in inorganic acid, insoluble in water.
Uses: Mainly used as yttrium iron garnet additives and nuclear reactor control materials, also used in the manufacture of special luminous glass and infrared absorbing glass, and also used as a glass colorant. It is obtained by separation and burning after erbium nitrate or erbium sulfate solution reacts with alkali.