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Grade | 99.999% | 99.99% | 99.9% | 99% |
CHEMICAL COMPOSITION | ||||
Y2O3/TREO (% min.) | 99.999 | 99.99 | 99.9 | 99 |
TREO (% min.) | 77 | 77 | 77 | 77 |
Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
La2O3/TREO CeO2/TREO Pr6O11/TREO Nd2O3/TREO Sm2O3/TREO Eu2O3/TREO Gd2O3/TREO Tb4O7/TREO Dy2O3/TREO Ho2O3/TREO Er2O3/TREO Tm2O3/TREO Yb2O3/TREO Lu2O3/TREO | 1 1 1 1 1 2 1 1 1 2 2 1 1 1 | 30 30 10 30 5 5 5 10 10 20 20 5 20 5 | 0.01 0.01 0.01 0.01 0.005 0.005 0.01 0.001 0.005 0.03 0.03 0.001 0.005 0.001 | 0.03 0.03 0.03 0.03 0.03 0.03 0.1 0.05 0.05 0.3 0.3 0.03 0.03 0.03 |
Non-Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
Fe2O3 SiO2 CaO Cl- CuO NiO PbO Na2O K2O MgO Al2O3 TiO2 ThO2 | 100 500 300 100 2 3 2 15 15 15 50 50 20 | 300 600 500 300 5 5 10 15 15 15 50 50 20 | 0.05 0.08 0.08 0.05 | 0.06 0.1 0.1 0.1 |