Chemical composition

Percentage (%)

K₂O

2.449

Na₂O

1.920

SiO₂

81.669

Al₂O₃

8.931

Fe₂O₃

1.700

TiO₂

0.196

CaO

0.830

MgO

0.905

SO₃

0.017

P₂O₅

0.048

Rb₂O

0.008

SrO

0.022

ZrO₂

0.014

BaO

0.069

LOI

1.222