Element

Oxide

Symbol

Wt. conc. (%)

Symbol

Wt. Conc. (%)

O

52.67

Ca

17.50

Ca

36.98

Si

13.55

Si

28.63

C

13.06

C

27.60

Al

1.46

Al

3.08

Fe

1.44

Fe

3.05

Mg

0.32

Mg

0.67