Lanthanum oxide

Lanthanum(III) oxide

Names
IUPAC name Lanthanum(III) oxide
Other names Lanthanum sesquioxide Lanthana
Identifiers
CAS Number	1312-81-8 Y
3D model (JSmol)	Interactive image
ChemSpider	2529886 Y 133008 Y
ECHA InfoCard	100.013.819
EC Number	215-200-5
PubChem CID	150906
RTECS number	OE5330000
UNII	4QI5EL790W
CompTox Dashboard (EPA)	DTXSID7051478
InChI InChI=1S/2La.3O/q2*+3;3*-2 Y Key: MRELNEQAGSRDBK-UHFFFAOYSA-N Y
SMILES [O-2].[O-2].[O-2].[La+3].[La+3]
Properties
Chemical formula	La2O3
Molar mass	325.808 g·mol−1
Appearance	White powder, hygroscopic
Density	6.51 g/cm3, solid
Melting point	2,315 °C (4,199 °F; 2,588 K)
Boiling point	4,200 °C (7,590 °F; 4,470 K)
Solubility in water	Insoluble
Band gap	4.3 eV
Magnetic susceptibility (χ)	−78.0·10−6 cm3/mol
Structure
Crystal structure	Hexagonal, hP5
Space group	P-3m1, No. 164
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Irritant
GHS labelling:
Pictograms	[1]
Signal word	Warning[1]
Hazard statements	H315, H319, H335[1]
Precautionary statements	P261, P280, P301+P310, P304+P340, P305+P351+P338, P405, P501[1]
NFPA 704 (fire diamond)	1 W
Flash point	Non-flammable
Safety data sheet (SDS)	External SDS
Related compounds
Other anions	Lanthanum(III) chloride
Other cations	Cerium(III) oxide Actinium(III) oxide
Related compounds	Lanthanum aluminium oxide, LaSrCoO4
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

Lanthanum(III) oxide, also known as lanthana, chemical formula La₂O₃, is an inorganic compound containing the rare earth element lanthanum and oxygen. It is used in some ferroelectric materials, as a component of optical materials, and is a feedstock for certain catalysts, among other uses.