Chemistry Forum

I observe that chert (SiO₂(OH)) has been replaced by sericite (KAl₂(AlSi₃O₁₀)(OH)₂), The agent or medium that contains the chemical elements that drive the reaction apparently contain K and Al and also contains Fe. The medium was apparently very hot and melted the chert for the reaction. What is a plausible balanced formular that could produce sericite from chert?.

I think you can mix Chert with aluminium oxide and potassium hydroxide.

2 KOH + 3 Al₂O₃ + 6 SiO₂ + H₂O => 2 KAl₂(AlSi₃O₁₀)(OH)₂