AM_Chalcophyllite
Formula: Cu9 Al As2 S1.5 O44 H48
Name: Chalcophyllite
Unit cell: 10.756 10.756 28.678 90.0 90.0 120.0 , V=2873.30
Space group: R11-3 (1)

Sabelli C , Zeitschrift fur Kristallographie , 151 (1980) p.129-140, The crystal structure of chalcophyllite, Locality: Cornwall, England