China Clay is a clay mineral with the chemical composition Al2Si2O5(OH)4. Rocks that are rich in kaolinite are known as china clay or white clay. China Clay has a low shrink-swell capacity and a low cation exchange capacity (1-15 meq/100g). It is a soft, earthy, usually white mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of aluminium silicate minerals.
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