Items
|
Grade
|
|||||
Er2O3/REO% min.
|
99
|
99.5
|
99.9
|
99.95
|
99.99
|
|
REO % min.
|
99
|
99
|
99
|
99
|
99
|
|
Rare earthimpurities
% max.
|
Dy2O3
|
Total 1.0
|
Total 0.5
|
Total 0.1
|
Total 0.05
|
0.0005
|
HO2O3
|
0.0015
|
|||||
Tm2O3
|
0.002
|
|||||
Yb2O3
|
0.002
|
|||||
Lu2O3
|
0.001
|
|||||
Y2O3
|
0.002
|
|||||
Other
Rare earth impurities %Max. |
0.001
|
|||||
% max. |
Fe2O3
|
0.005
|
0.002
|
0.001
|
0.001
|
0.0005
|
SiO2
|
0.02
|
0.01
|
0.005
|
0.005
|
0.003
|
|
CaO
|
0.02
|
0.02
|
0.01
|
0.005
|
0.001
|
|
CuO
|
-
|
-
|
-
|
0.001
|
0.001
|
|
PbO
|
-
|
-
|
-
|
0.001
|
0.001
|
|
NiO
|
-
|
-
|
-
|
0.001
|
0.001
|