AM_Pyrophyllite_2 Formula: Al Si2 O6 H Name: Pyrophyllite Unit cell: 5.14 8.9 18.55 90.0 99.92 90.0 , V=835.90 Space group: C12/C1 (15)

Gruner J W , Zeitschrift fur Kristallographie , 88 (1934) p.412-419, The crystal structures of talc and pyrophyllite, Locality: Tres Cerritos, Mariposa County, California, USA