TREO

La₂O₃/TREO

CeO₂/TREO

Pr₆O₁₁/TREO

Sm₂O₃/TREO

≥43%

≥30%

≥60%

6-8%

<0.0010%

Nd₂O₃/TREO

Cl^-

SO₄^2-

CaO+MgO/TREO

Fe₂O₃

<0.1%

≤ 0.1%

<0.05%

<2.5%

<0.01%