Yttrium(III) oxide

Yttrium(III) oxide
Names
	IUPAC name Yttrium(III) oxide.
	Other names Yttria,; diyttrium trioxide, ; yttrium sesquioxide
Identifiers
CAS Number	1314-36-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	140159;
ECHA InfoCard	100.013.849
EC Number	215-233-5;
PubChem CID	518711;
RTECS number	ZG3850000;
UNII	X8071685XT;
CompTox Dashboard (EPA)	DTXSID5051573 ;
	InChI InChI=1S/3O.2Y Key: SIWVEOZUMHYXCS-UHFFFAOYSA-N;
	SMILES O=[Y]O[Y]=O;
Properties
Chemical formula	Y2O3
Molar mass	225.81 g/mol
Appearance	White solid.
Density	5.010 g/cm3, solid
Melting point	2,425 °C (4,397 °F; 2,698 K)
Boiling point	4,300 °C (7,770 °F; 4,570 K)
Solubility in water	insoluble
Solubility in alcohol ; acid	soluble
Magnetic susceptibility (χ)	+44.4·10−6 cm3/mol
Structure
Crystal structure	Cubic (bixbyite), cI80
Space group	Ia3 (No. 206)
Coordination geometry	Octahedral
Thermochemistry
Std molar; entropy (S⦵298)	99.08 J/mol·K
Std enthalpy of; formation (ΔfH⦵298)	-1905.310 kJ/mol
Gibbs free energy (ΔfG⦵)	-1816.609 kJ/mol
Hazards
	Lethal dose or concentration (LD, LC):
LDLo (lowest published)	>10,000 mg/kg (rat, oral); >6000 mg/kg (mouse, oral)
Related compounds
Other anions	Yttrium(III) sulfide
Other cations	Scandium(III) oxide,; Lutetium(III) oxide
Related compounds	Yttrium barium; copper 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

Yttrium oxide, also known as yttria, is Y₂O₃. It is an air-stable, white solid substance.

The thermal conductivity of yttrium oxide is 27 W/(m·K).

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