Chemical Composition

SiO₂

Al₂O₃

Fe₂O₃

K₂O

TiO₂

Na₂O

CaO

MgO

I.L*

(at 1000˚C)

51.6

34.7

0.7

0.3

0.1

0.1

-

0.1

12.7

Mineralogical Composition

Kaolinite = 83; Illite = 6; Quartz = 10; Anatase = trace