Lanthanum oxide
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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.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Lanthanum(III) oxide | |
Other names
Lanthanum sesquioxide Lanthana | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.013.819 |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
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) |
Insoluble | |
Band gap | 4.3 eV |
−78.0·10−6 cm3/mol | |
Structure | |
Hexagonal, hP5 | |
P-3m1, No. 164 | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Irritant |
GHS labelling: | |
[1] | |
Warning[1] | |
H315, H319, H335[1] | |
P261, P280, P301+P310, P304+P340, P305+P351+P338, P405, P501[1] | |
NFPA 704 (fire diamond) | |
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).
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