AM_Pyrophyllite_1
Formula: Al Si2 O6 H
Name: Pyrophyllite
Unit cell: 5.16 8.966 9.347 91.18 100.46 89.64 , V=425.16
Space group: C-1 (2)

Lee J H , Guggenheim S , American Mineralogist , 66 (1981) p.350-357, Single crystal X-ray refinement of pyrophyllite-1Tc