this is the VRML picture of Phrophyllite structure (click the picture by using the tools menu at the window)



Pyrophyllite is an aluminum silicate mineral with a similar chemical structure to talc (a magnesium silicate). It is non-plastic yet clay-like and often used in ceramic bodies to decrease thermal expansion and moisture expansion during service. It is a very soft white mineral (also resembling talc in physical appearance and feel).