Oxides (%)

China Clay Qty

Fire Clay Yorkshire

Building Brick Clay Glacial

Flint Clay Negev

Ball Clay Tennessee

(Belpahar Refractory Clay India

Residual Kaolin Ibadan

Kankara Clay Katsina

SiO₂

46.88

56.60

60.10

36.00

53.96

50.00

63.20

44.09

Al₂O₃

37.65

26.90

17.10

47.00

29.34

31-33

25.61

38.67

Fe₂O₃

0.88

1.70

5.40

1.20

0.98

3.5

1.52

1.13

TiO₂

0.09

1.30

1.20

3.00

-

1.38

0.22

2.21

Na₂O

0.21

0.22

0.70

0.30

0.12

1.36 - 2.0

0.24

0.36

K₂O

1.61

1.26

2.70

0.30

0.28

1.75

0.52

CaO

0.03

0.20

3.70

0.20

0.37

0.61

0.10

1.20

MgO

0.13

0.30

2.80

0.20

0.30

0.38

0.05

0.15

LOI

8.00

1.26

6.40

13.00

14.01

9-14

13.50

14.43