Cerium(IV) oxide

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. It is an important commercial product and an intermediate in the purification of the element from the ores. The distinctive property of this material is its reversible conversion to a non-stoichiometric oxide.

For the other compound also known as cerium oxide, see Cerium(III) oxide.
Cerium(IV) oxide
Names
IUPAC name
Cerium(IV) oxide
Other names
Ceric oxide,
Ceria,
Cerium dioxide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.013.774
UNII
  • InChI=1S/Ce.2O/q+4;2*-2 Y
    Key: OFJATJUUUCAKMK-UHFFFAOYSA-N Y
  • InChI=1/Ce.2O/q+4;2*-2
    Key: OFJATJUUUCAKMK-UHFFFAOYAX
  • [O-2]=[Ce+4]=[O-2]
Properties
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)
insoluble
+26.0·10−6 cm3/mol
Structure
cubic crystal system, cF12 (fluorite)
Fm3m, #225
a = 5.41 Å , b = 5.41 Å, c = 5.41 Å
α = 90°, β = 90°, γ = 90°
Ce, 8, cubic
O, 4, tetrahedral
Hazards
NFPA 704 (fire diamond)
1
0
0
Related compounds
Related compounds
 Cerium(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references
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