Lanthanum Oxide La2O3
Specifications
- Origin
- CHINA
- Price Term
- EX-Work
- Payment Term
- T/T
Lanthanum Oxide La2O3 is a Inorganic Chemicals product. Key specs — Origin: CHINA; Price Term: EX-Work; Payment Term: T/T.
Product Description
Lanthanum Oxide La2O3, Properties Molecular formula La2O3 Molar mass 325.81 g/mol Appearance White powder, hygroscopic Density 6.51 g/cm3, solid Melting point 2315 'C (2588 K) Boiling point 4200 'C (4500 K) Solubility in water Insoluble CAS No.: 1312-81-8 spec typical TREO: 97% min. 98.5% La2O3/TREO: 99.9% min. 99.95% CeO2/ TREO: 0.025% max.
0.01% Pr6O11/TREO: 0.025% max. 0.01% Nd2O3/TREO: 0.015% max. 0.01% Sm2O3/TREO: 0.02% max. 0.003% Y2O3/TREO: 0.01% max. 0.001% Fe2O3: 0.02% max. 0.008% CaO: 0.20% max. 0.07% Cl: 0.10% max. 0.06% SiO2: 0.03% max. 0.03% L.O.I.: 3% max. 1.2% Synthesis lanthanum oxide crystallizes as several polymorphs.
To produce hexagonal La2O3, a 0.1 M solution of LaCl3 is sprayed onto a preheated substrate, usually made of metal chalcogenides.[3] The process can be viewed as occurring in two steps – hydrolysis followed by dehydration: 2 LaCl3 + 3 H2O → La(OH)3 + 3 HCl 2 La(OH)3 → La2O3 + 3 H2O An alternative route to hexagonal La2O3 involves precipitation of nominal La(OH)3 from aqueous solution using a combination of 2.5% NH3 and the surfactant sodium dodecyl sulfate followed by heating and stirring for 24 hours at 80 °C: 2 LaCl3+ 3 H2O + 3 NH3 → La(OH)3 + 3 NH4Cl LaCl3·3H2O → La2O3 Other routes include: 2 La2S3 + 3 CO2 → 2 La2O3 + 3 CS2 2 La2(SO4)3 + heat → 2 La2O3 + 6 SO3 Other cations Scandium(III) oxide Yttrium(III) oxide Actinium(III) oxide Related compounds Lanthanum aluminium oxide, LaSrCoO4
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