Explanation

Kaolin, or 'china clay' as it is commonly called, is a hydrated aluminum silicate crystalline mineral

Kaolinite is a clay mineral, with the chemical composition: Al2Si2O5(OH)4.

It is a layered silicate mineral, with one tetrahedral sheet of silica ( SiO 4) linked through oxygen atoms to one octahedral sheet of alumina ( AlO 6).