SYMBOL

Ball Clay FX (CA1)

Ball Clay R

Eckaglas (kaolin)

Eckalite 1
(kaolin)

Bentonite (USA)

Molochite

Wollastonite

Cornish
Stone

SiO₂

61.5

67.0

47.0

46.0

60.6

51.0

70.4

Al₂O₃

25.1

20.6

37.0

38.0

21.2

1.8

16.7

Fe₂O₃

1.0

0.93

0.8

0.45

3.4

0.41

1.5

CaO

0.06

0.10

-

0.03

0.1

44.8

1.4

MgO

0.77

0.58

-

0.01

2.3

1.1

0.1

TiO₂

1.27

1.32

0.7

0.70

-

-

0.2

Na₂O

0.16

0.17

0.3

0.05

2.3

-

2.6

K₂O

2.88

2.7

0.11

0.5

-

5.8

Ignition
Loss

7.29

6.2

13.7

14.0

5.6

-

1.3

SYMBOL

Silica

Feldspar
Potash

Pyrophyllite

Whiting

Dolomite-
Natural

Nepheline
Syenite

Clay Ceram
BBR

SiO₂

99.5

66.0

68.5

65.8

0.05

5.0

60.7

52.4

Al₂O₃

-

18.0

18.5

28.2

-

0.1

23.3

31.2

Fe₂O₃

0.1

0.2

0.2

0.12

0.1

0.6

0.07

-

CaO

-

-

-

0.28

99.0

-

0.7

0.13

MgO

-

-

-

0.01

-

-

0.1

0.35

K₂O

-

12.0

0.2

0.04

-

-

4.6

0.51

Na₂O

-

3.0

10.6

0.10

-

-

9.8

0.19

TiO₂

-

-

-

0.18

-

-

-

1.2

P₂O₅

-

-

-

0.01

-

-

-

0.11

MgCO₃

-

-

-

-

-

31.0

-

-

CaCO₃

-

-

-

-

-

63.0

-

-

0.2

0.8

0.3

5.19

-

-

0.7

13.5