Chemical composition

Sample A

Sample B

Sample C

Weight % (wt.%)

Weight % (wt.%)

Weight % (wt.%)

Na₂O

1.0857

1.1189

1.0218

MgO

3.7935

3.8349

7.8776

SiO₂

44.6240

43.6460

36.9253

Al₂O₃

18.6640

18.4357

15.6991

Fe₂O₃

23.6954

24.3772

16.6620

TiO₂

0.7863

0.8113

1.4407

Cao

5.5200

5.4987

12.2797

K₂O

0.6415

0.6073

0.3996

MnO

0.2897

0.8486

6.9253