REO

≥66.09

≥65.76

La₂O₃/REO

≥99.99

≥99.90

稀土相對純度(wt﹪)

CeO₂/TREO

≤0.0015

合量≤1.0

Pr₆O₁₁/TREO

≤0.0015

Nd₂O₃/TREO

≤0.0010

Sm₂O₃/TREO

≤0.0010

Y₂O₃/TREO

≤0.0010

Eu₂O₃/TREO

其余合量≤0.0040

-

Gd₂O₃/TREO

Tb₄O₇/TREO

Dy₂O₃/TREO

Ho₂O₃/TREO

Er₂O₃/TREO

Tm₂O₃/TREO

Yb₂O₃/TREO

Lu₂O₃/TREO

非稀土雜質含量(wt﹪)從下面開始

Fe₂O₃

≤0.0010

≤0.0030

SiO₂

≤0.0030

≤0.0050

CaO

≤0.0010

≤0.0030

CuO

≤0.0010

≤0.0030

NiO

≤0.0010

≤0.0020

PbO

≤0.0010

≤0.0020

Al₂O₃

≤0.0010

≤0.0020

MnO₂

≤0.0010

≤0.0020

MgO

≤0.0010

≤0.010

Na₂O

≤0.0010

≤0.010

K₂O

≤0.0010

≤0.010

NH₄⁺

≤0.050

≤0.10

水不溶物

≤0.01

≤0.05

水分

≤0.5

≤1.0