Erbium(III) oxide

Erbium oxide
Names
	Other names Erbium oxide, erbia
Identifiers
CAS Number	12061-16-4 ;
3D model (JSmol)	Interactive image; ionic: Interactive image;
ChemSpider	4298039 ;
ECHA InfoCard	100.031.847
EC Number	235-045-7;
PubChem CID	159426;
CompTox Dashboard (EPA)	DTXSID60893839 ;
	InChI InChI=1S/2Er.3O Key: VQCBHWLJZDBHOS-UHFFFAOYSA-N ; InChI=1/2Er.3O/rEr2O3/c3-1-5-2-4 Key: VQCBHWLJZDBHOS-YMHUIQTEAQ;
	SMILES O=[Er]O[Er]=O; ionic: [O-2].[Er+3].[O-2].[Er+3].[O-2];
Properties
Chemical formula	Er2O3
Molar mass	382.56 g/mol
Appearance	pink crystals
Density	8.64 g/cm3
Melting point	2,344 °C (4,251 °F; 2,617 K)
Boiling point	3,290 °C (5,950 °F; 3,560 K)
Solubility in water	insoluble in water
Magnetic susceptibility (χ)	+73,920·10−6 cm3/mol
Structure
Crystal structure	Cubic, cI80
Space group	Ia-3, No. 206
Thermochemistry
Heat capacity (C)	108.5 J·mol−1·K−1
Std molar; entropy (S⦵298)	155.6 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−1897.9 kJ·mol−1
Related compounds
Other anions	Erbium(III) chloride
Other cations	Holmium(III) oxide, Thulium(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

Erbium(III) oxide is the inorganic compound with the formula Er₂O₃. It is a pink paramagnetic solid. It finds uses in various optical materials.