La2O3/TREO (% min.) | 99.999 | 99.99 | 99.9 | 99 |
TREO (% min.) | 45 | 45 | 43 | 43 |
Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
CeO2/TREO Pr6O11/TREO Nd2O3/TREO Sm2O3/TREO Eu2O3/TREO Gd2O3/TREO Y2O3/TREO | 5 5 2 2 2 2 5 | 50 50 30 10 10 10 50 | 0.05 0.01 0.01 0.01 0.001 0.001 0.01 | 0.5 0.1 0.1 0.1 0.1 0.1 0.1 |
Non-Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
Fe2O3 SiO2 CaO CoO NiO CuO MnO2 Cr2O3 CdO PbO | 10 50 100 3 3 3 3 3 5 10 | 50 100 200 5 5 3 5 3 5 50 | 0.01 0.05 0.2 | 0.02 0.2 0.5 |