Which is a incorrect match in the following

Solution(By Examveda Team)

Kaolinite is a clay mineral with layered silicate minerals, with one tetrahedral sheet of silica linked through an oxygen sheet of alumina octahedral. It is observed that kaolinite is very active in phosphate fixation.
An illite is a group of closely non-expanding clay minerals. Its structure is a 2 : 1 sandwich of silica tetrahedron–silica layers.
Montmorillonite is a very soft phyllosilicate group of minerals that form when they precipitate from water solution as microscopic crystals. Its chemical formula is (Na, Ca)_0.33(Al, Mg)₂(Si₄O₁₀)(OH)₂·nH₂O.
Vermiculite is a hydrous phyllosilicate mineral that undergoes significant expansion when heated. Vermiculite clays are weathered micas in which the potassium ions between the molecular sheets are replaced by magnesium and iron ions.