Formula La2O3
CAS No. 1312-81-8
Molecular Weight 325.82
Appearance White powder
Solubility Insoluble in water, moderately soluble in strong mineral acids
Stability Strongly hygroscopic
Application:Lanthanum Oxide, also called Lanthana, high purity Lanthanum Oxide (99.99 to 99.999%) is applied in making special optical glasses to improves the alkali resistance of glass, and also in La-Ce-Tb phosphors for fluorescent lamps. Low grade of Lanthanum Oxide is widely used in ceramics and FCC catalyst, and also as raw material for Lanthanum Metal production.
Standard Specifications
| Grade | 99.999% | 99.995% | 99.99% | 99.9% | 99% |
| CHEMICAL COMPOSITION | |||||
| La2O3/TREO (% min.) | 99.999 | 99.995 | 99.99 | 99.9 | 99 |
| TREO (% min.) | 99 | 99 | 99 | 98 | 98 |
| Loss on ignition (% max.) | 1.0 | 1.0 | 1.0 | 2.0 | 2.0 |
| Rare Earth Impurities | % max. | % max. | % max. | % max. | % max. |
| CeO2/TREO Pr6O11/TREO Nd2O3/TREO Sm2O3/TREO Eu2O3/TREO Gd2O3/TREO Y2O3/TREO |
0.0002 0.0002 0.0001 0.0001 0.0001 0.0001 0.0005 |
0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 |
0.005 0.005 0.001 0.001 0.001 0.001 0.005 |
0.05 0.01 0.01 0.01 0.001 0.001 0.005 |
0.5 0.1 0.1 0.01 0.01 0.01 0.1 |
| Non-Rare Earth Impurities | % max. | % max. | % max. | % max. | % max. |
| Fe2O3 SiO2 CaO CoO NiO CuO MnO2 Cr2O3 CdO PbO |
0.0001 0.005 0.005 0.0002 0.0002 0.0002 0.0002 0.0002 0.0005 0.0005 |
0.0002 0.005 0.005 0.0002 0.0002 0.0002 0.0002 0.0003 0.0005 0.001 |
0.0005 0.01 0.01 0.0005 0.0005 0.0003 0.0005 0.0003 0.0005 0.001 |
0.005 0.05 0.05 |
0.01 0.05 0.05 |
| Particle size (D50, microns) |
2.0-6.0 | 50.0-60.0 | 2.0-7.0 |
Individual Rare earth including Lanthanum, Cerium, Neodymium, Praseodymium, Samarium, Europium, Gadolinium, Dysprosium, Terbium, Holmium, Erbium, Ytterbium, Lutetium, Thulium, Scandium and Yttrium.