Pyrophyllite Gruner J W Zeitschrift fur Kristallographie 88 (1934) 412-419 The crystal structures of talc and pyrophyllite Locality: Tres Cerritos, Mariposa County, California, USA _database_code_amcsd 0010542 5.14 8.90 18.55 90 99.92 90 C2/c atom x y z Al 0 .333 0 Si1 -.239 0 .143 Si2 .261 .167 .143 O1 .203 .5 .058 O2 .203 .167 .058 OH1 .203 -.167 .058 O3 .025 .083 .176 O4 -.475 .083 .176 O5 .275 .333 .176