SiO₂

Al₂O₃

Na₂O

K₂O

MgO

CaO

Fe₂O₃

SO₃

P₂O₅

TiO₂

Oxide (wt.%)

57.1

22.1

1.8

1.9

2.7

3.6

8.7

0.5

0.4

0.9