Chemical composition of clay

Element

SiO₂

Al₂O₃

Fe₂O₃

TiO₂

MgO

CaO

K₂O

Na₂O

P₂O₅

Mn₂O₃

BaO

ZrO₂

LOI

wt%

54.9

23.4

4.8

1.9

0.9

0.5

0.5

0.2

0.2

0.1

0.1

0.0

10.5

Mineralogical composition of clay

Element

Kaolinite

Quartz

Geothite

Rutile

Gibsite

Halloysite

Feldspar

%(mineral)

47

24.1

5.2

3.4

3.6

4.0

1.9