Dear Mr. Yadav,

may be these bullet points summarized by an economic geology can contribute to a solution of your issue.

• Pyrophyllite (Al2(OH)2/Si4O10) is brough about by hydrothermal solutions which affected siliceous igneous rocks such as rhyolite, dazite and their equivalent pyroclastic rocks

• Pyrophyllite rarely occurs in pure pyrophyllite ore bodies but generally is associated with chlorite, sericite, alunite-group minerals,

• Andalusite, diaspore, boehmite and corundum

• Pyrophyllite deposits in shallow high- and low sulphidation-type deposits

• Pyrophyllite deposits in alkaline lakes

• Talc (chlorite, pyrophyllite) deposits in marbles and shearzones

• Pyrophyllite schists

Pyrophyllite is genetically and mineralogically associated with talc even if they are chemically very different and pyrophyllite is more akin to kaolinite group minerals

With kind regards

H.G.Dill

Thank you very much...

Dr. Harald G. Dill,

Your comments are very useful.