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Codes
Chemical Compositions ﹛%
TREM
Ce/TREM
Pr/TREM
Nd/TREM
La/TREM
Fe
Si
W
1
>99
>50-56
>5-7
>13-19
>23-29
<0.5
<0.03
2
≡99
50-58
3.5-7
13-20
21-29
≒0.5
≒0.2
≒0.1
3
53㊣3
16㊣3
26㊣3
4
>98.5
>48-56
>4-7
>12-20
<20-27
<0.2
-
Mo
Mg
Ti
Al
C
Zn
Mn
Pb
<0.1
<0.01
<0.05
<0.07
≒0.07
0.05