Chapter 11 Clays GEOL 215

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8 Terms

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Clay definition

soil particles with diameter <..005 mm

Type of fine-grained natural soil material containing clay minerals

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4 main groups

Kandites

Illiites

Smectites

Chlorites

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Kandites

1:1, Al2(Si2O5)(OH)4, Kaolinite- white china clay

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Illites

2:1, three layer (S-G-S), nonswelling

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Smectites

2:1, Three layer (S-G-S/S-B-S), swelling clay

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Chlorites

2:1:1, Four layer (S-B-S +B)

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Fe and Mn oxides dn hydroxides characteristics

Insoluble- residual phase

Ancient pigments

Common component in lateritic soils (oxisols) in tropics

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Al Oxides and Hydroxides

Highly insoluble

Tropical > acidic

Bauxite