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Impurities content (weight %) | |
---|---|
Samarium (Sm3+) | <0.0001 |
Europium (Eu3+) | <0.0001 |
Terbium (Tb3+) | <0.0001 |
Yttrium (Y3+) | <0.0001 |
Iron (Fe2+) | <0.0001 |
Calcium (Ca2+) | <0.0005 |
Copper (Cu2+) | <0.00005 |
Silicon dioxide (SiO2) | <0.0001 |
Chlorides (Cl-) | <0.0005 |
pH of 5%-water solution | 4.0 - 6.0 |