Molecular Formula: (Na,Ca) 0.33 (AI,Mg,Fe)₂[(Si,AI)₄O₁₀(OH)₂.nH₂O
        Bentonite is a clay mineral with turface as its main composition; it has hydroscopicity, dilatability, cation exchange, adsorptivity, wetting and decoloring properties; widely used in drilling mud, sandbinder, decoloring of vegetable/animal oils, purificant, rubber, plastic fillers, dryers, sorbents, detergents, mineral feed additives etc.
Physical Property

Item

Calcic soil

Sodium soil

100-300

100-300

>95

>95

7.60

10

99.55

67

67

11.38

50

100

5.8

70

0.43

0.90

4.0

8.0

1450

>10

>14