Lanthanum (III) Oxide (La2O3)

Categories Lanthanum, Rare earth

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Additional information

Item Number	OX57
Product Name	Lanthanum Oxide (La2O3)
CAS Number	1312-81-8
M. F.	La2O3
Purity	99.99%; 99.999% (REO)
Form*	P, ST

Description:

Lanthanum (III) Oxide (La₂O₃) is a white, odorless, hygroscopic powder that is one of the most stable oxides of lanthanum. It is an insoluble, alkaline compound with high thermal stability.

CAS No.: [1312-81-8]
Molecular Weight: 325.81 g/mol
Density: 6.51 g/cm³
Melting Point: ~2,315°C (4,199°F)
Boiling Point: ~4,200°C (7,592°F) (sublimes)
Solubility: Reacts with water to form lanthanum hydroxide; soluble in acids.

Key Properties:

High Refractive Index – Used in optical glass and coatings.
Alkaline Nature – Reacts with acids and absorbs CO₂ from air.
Thermal Stability – Maintains structure at very high temperatures.
Electrical Properties – Used in ceramic capacitors and solid oxide fuel cells (SOFCs).

Applications:

Optical & Glass Manufacturing

Key component in specialty glasses, including camera lenses, fiber optics, and low-dispersion optical glass.
Improves refractive index and alkali resistance in glass.

Electronics & Ceramics

Dielectric material in multilayer ceramic capacitors (MLCCs).
Used in lanthanum-doped barium titanate (BaTiO₃) for high-performance electronics.
Solid oxide fuel cells (SOFCs) – Enhances ionic conductivity in electrolytes.

Catalysts & Chemical Processes