Cerium(IV) oxide, also known as ceric oxide, ceric dioxide, ceria, cerium oxide or cerium dioxide, is an oxide of the rare-earth metal cerium. It is a pale yellow-white powder with the chemical formula CeO2.
Molar mass： 172.115 g/mol
Appearance： white or pale yellow solid, slightly hygroscopic
Density： 7.215 g/cm3
Melting point： 2,400 °C (4,350 °F; 2,670 K)
Boiling point： 3,500 °C (6,330 °F; 3,770 K)
Solubility in water：insoluble
Magnetic susceptibility (χ)：+26.0·10−6 cm3/mol
Crystal structure：cubic (fluorite)
It is used as additive in glass industry, as grinding material for plate glass, and can also be used as anti-ultraviolet in cosmetics.Has been expanded to glasses, optical lenses, picture tube grinding, decolorization, clarification, glass uv and absorption of electronic lines.