SiO₂ (%)

Al₂O₃ (%)

Fe₂O₃ (%)

CaO (%)

MgO (%)

K₂O (%)

Na₂O (%)

SO₃ (%)

L.O.I^a (%)

Wack clay

54.22

20.15

9.22

1.69

0.56

3.43

0.76

0.05

11