Physical and chemical characteristics

Zeolites

Clinoptilolite

Stilbite

SiO₂/Al₂O₃

0.53

0.09

CEC (meq∙g⁻¹)

2.96

2.55

pH (water)

10.0

8.4

Specific area (m²∙g⁻¹)

72.2

8.8

Pore volume (×10⁻³ cm³∙g⁻¹)

25.6

1.0

Pore diameter (Å)

77.5

115.1

SiO₂ (%)

71.1

62.5

Al₂O₃ (%)

14.6

16.3

CaO (%)

7.3

9.5

K₂O (%)

2.4

2.5

SO₃ (%)

1.9

2.1

Fe₂O₃ (%)

2.2

6.0