Cerium(IV) oxide

Cerium(IV) oxide
Names
	IUPAC name Cerium(IV) oxide
	Other names Ceric oxide,; Ceria,; Cerium dioxide
Identifiers
CAS Number	1306-38-3 ; 12014-56-1 (hydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:79089 ;
ChemSpider	8395107 ;
ECHA InfoCard	100.013.774
PubChem CID	73963;
UNII	619G5K328Y ; 20GT4M7CWG (hydrate) ;
CompTox Dashboard (EPA)	DTXSID4040214 ;
	InChI InChI=1S/Ce.2O/q+4;2-2 Key: OFJATJUUUCAKMK-UHFFFAOYSA-N ; InChI=1/Ce.2O/q+4;2-2 Key: OFJATJUUUCAKMK-UHFFFAOYAX;
	SMILES [O-2]=[Ce+4]=[O-2];
Properties
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
Structure
Crystal structure	cubic crystal system, cF12 (fluorite)
Space group	Fm3m, #225
Lattice constant	a = 5.41 Å , b = 5.41 Å, c = 5.41 Å α = 90°, β = 90°, γ = 90°
Coordination geometry	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). verify (what is ?) Infobox references

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.

^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
^ E. A. Kümmerle and G. Heger, “The Structures of C-Ce2O3+δ, Ce7O12, and Ce11O20,” Journal of Solid State Chemistry, vol. 147, no. 2, pp. 485–500, 1999.

[1] Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8

[2] E. A. Kümmerle and G. Heger, “The Structures of C-Ce2O3+δ, Ce7O12, and Ce11O20,” Journal of Solid State Chemistry, vol. 147, no. 2, pp. 485–500, 1999.

[1]

[2]

Names


IUPAC name Cerium(IV) oxide
Other names Ceric oxide, Ceria, Cerium dioxide
Identifiers
CAS Number	1306-38-3^Y 12014-56-1 (hydrate)^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:79089^N
ChemSpider	8395107^Y
ECHA InfoCard	100.013.774
PubChem CID	73963
UNII	619G5K328Y^N 20GT4M7CWG (hydrate)^Y
CompTox Dashboard (EPA)	DTXSID4040214
InChI 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
SMILES [O-2]=[Ce+4]=[O-2]
Properties
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
Structure
Crystal structure	cubic crystal system, cF12 (fluorite)^[1]
Space group	Fm3m, #225
Lattice constant	a = 5.41 Å ^[2], b = 5.41 Å, c = 5.41 Å α = 90°, β = 90°, γ = 90°
Coordination geometry	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