Constituents

Percentage

SiO₂

20 - 67

Al₂O₃

4 - 99

Fe₂O₃

3 - 18

CaO

63 - 30

MgO

2 - 73

K₂O

0 - 37

Na₂O

0 - 29

SO₃

2 - 44

LOI

1 - 52

IR(ISO)

0 - 21

CaO

2 - 41