Studied clay samples

C1

C2

C3

Chemical composition (wt.%)

SiO₂

57.28

65.81

58.70

Al₂O₃

14.36

12.29

14.40

Fe₂O₃

9.23

6.16

7.27

K₂O

3.64

4.10

3.67

MgO

0.73

0.75

0.91

TiO₂

1.40

1.09

1.40

P₂O₅

0.14

0.09

0.12

CaO

1.05

1.31

2.61

Na₂O

1.08

1.26

1.04

MnO

0.17

0.11

0.07

L.O.I

10.92

7.03

9.81

Total

100

100

100

SiO₂/Al₂O₃

3.99

5.35

4.08

CaO + MgO + K₂O + Na₂O

6.5

7.42

8.23

CIA

71.33

64.82

62.30