Major oxides

Trace elements

REEs

SiO₂ r ≥ 0.90

Al₂O₃, K₂O

Ta

-

SiO₂ r > 0.70 to 0.90

-

Ga, Nb, Rb, Bi

-

Al₂O₃ r ≥ 0.90

SiO₂, K₂O

Ga, Rb

-

Al₂O₃ r > 0.70 to 0.90

-

Nb, Ta,

La, Ce

Fe₂O₃ r ≥ 0.90

-

-

-

Fe₂O₃ r > 0.70 to 0.90

-

V

Gd

CaO r ≥ 0.90

-

-

-

CaO r > 0.70 to 0.90

P₂O₅

Be, Zr

-

MgO r ≥ 0.90

TiO₂

-

-

MgO r > 0.70 to 0.90

-

Ba, Co, Cs, Nb, Cu, Ni

La, Ce, Pr, Nd

Na₂O r ≥ 0.90

-

-

-

Na₂O r > 0.70 to 0.90

P₂O₅

Be, Th, U, Zr, -Y, Pb, Bi

Dy, Ho, Er, Tm, Yb, Lu

K₂O r ≥ 0.90

SiO₂, Al₂O₃

Rb,Ga

-

K₂O r > 0.70 to 0.90

-

Nb, Ta, Bi

-

MnO r ≥ 0.90

-

-

-

MnO r > 0.70 to 0.,90

-

-

-

TiO₂ r ≥ 0.90

-

Ba, Co, Nb, Cu

La, Ce, Pr, Nd

TiO₂ r > 0.70 to 0.90

MgO

Cs, Ta, Ni

TiO₂-Sm

P₂O₅ r ≥ 0.90

-

Be, U, Zr

-

P₂O₅ r > 0.70 to 0.90

CaO, Na₂O

Th, Y, Pb, As, Sb, Mo

Dy, Ho, Er, Tm, Yb, Lu