Scandium oxide

Scandium(III) oxide
	__ Sc3+ __ O2−
Names
	IUPAC name Scandium(III) oxide
	Other names Scandia, scandium sesquioxide
Identifiers
CAS Number	12060-08-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	3776136;
ECHA InfoCard	100.031.844
EC Number	235-042-0;
PubChem CID	4583683;
UNII	T0G94L07ZD ;
CompTox Dashboard (EPA)	DTXSID1051224 ;
	InChI InChI=1S/3O.2Sc;
	SMILES O=[Sc]O[Sc]=O;
Properties
Chemical formula	Sc2O3
Molar mass	137.910 g/mol
Appearance	White powder
Density	3.86 g/cm3
Melting point	2,485 °C (4,505 °F; 2,758 K)
Solubility in water	insoluble in water
Solubility	soluble in hot acids (reacts)
Structure
Crystal structure	Bixbyite
Space group	Ia3 (No. 206)
Lattice constant	a = 985 pm
Hazards
NFPA 704 (fire diamond)	1 0 0
Related compounds
Other anions	Scandium(III) sulfide
Other cations	Yttrium(III) oxide ; Lutetium(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

Scandium(III) oxide or scandia is an inorganic compound with formula Sc₂O₃. It is one of several oxides of rare earth elements with a high melting point. It is used in the preparation of other scandium compounds as well as in high-temperature systems (for its resistance to heat and thermal shock), electronic ceramics, and glass composition (as a helper material).