AM_Pyrophyllite-1Tc
Formula: Al2 Si4 O11
Name: Pyrophyllite-1Tc
Unit cell: 5.1919 9.1224 9.499 91.17 100.21 88.62 , V=442.58
Space group: C-1 (2)

Wardle R , Brindley G W , American Mineralogist , 57 (1972) p.732-750, The crystal structures of pyrophyllite, 1Tc, and of its dehydroxylate