1.

Which of the following types of clay mineral includes potassium in the layer structure?(a) Chlorite(b) Vermiculite(c) Illite(d) Kaolinite

Answer» Correct option is (c) Illite

The explanation: Illite is a clay mineral which has potassium in the interlayer structure. The size and coordination number of potassium are like that it fits tightly in the hexagonal ring of oxygen of the tetrahedral sheets. This makes the structure a strong interlocking ionic bond which packs the individual layers together and restricts the water particles from immersing the interlayer site.


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