Clay sample

A

B₁

E

F

H

I₁

I₂

J

K

L

LOI

9.3

4.5

5.0

9.0

7.2

8.0

9.0

8.2

9.7

9.9

SiO₂

49.4

63.1

65.0

71.0

66.0

55

46.0

48.0

45.0

44.3

Al₂O₃

20.1

10.5

11.1

8.4

9.0

15.0

12.0

13.0

18.3

19.4

Fe₂O₃

8.0

1.5

1.4

1.8

3.5

5.7

6.0

4.1

5.7

6.2

CaO

0.2

0.1

0.1

ND

ND

2.0

2.1

2.0

2.3

2.4

Na₂O

0.1

0.1

0.1

ND

0.1

3.0

3.0

2.0

3.5

3.4

K₂O

0.3

0.4

0.1

ND

ND

1.0

1.2

2.1

2.4

2.6

Total

87.4

80.2

82.8

83.0

85.8

89.7

79.3

79.4

86.9

88.2